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We are world-leading innovators, creating the unique technologies which will bring Quantum Computing from the theoretical to the indispensable. News & events ANNOUNCEMENTS LATEST Oxford Ionics Unveils Development Roadmap to Scalable Fault-Tolerant Quantum Computing Oxford Ionics today announced its development roadmap to achieve scalable fault-tolerant quantum computing. READ MORE > 03/04/25 DARPA selects Oxford Ionics Quantum Benchmarking Initiative Oxford Ionics, a world leader in trapped-ion quantum computing, today announced it has been selected by the United States’ Defense Advanced Research Projects Agency (DARPA) for its Quantum Benchmarking Initiative (QBI). 18/03/25 UK Science Minister Opens Oxford Ionics HQ Lord Patrick Vallance, Minister of State for Science, Research, and Innovation officiated the grand opening of the new HQ located in Oxford. 11/03/25 Oxford Ionics selected for Quantum Missions Pilot The Q-Surge consortium, led by Oxford Ionics, was selected by the UK’s Department of Science, Technology, and Innovation (DSIT). ALL ANNOUNCEMENTS > IN THE NEWS Quantum Computing Roadmaps: A Look at The Maps And Predictions of Major Quantum Players 16/05/25 | The Quantum Insider Button Oxford Ionics’ development roadmap to scalable fault-tolerant quantum computing 08/05/25 | Electronic Specifier Button Oxford Ionics Unveils Development Roadmap to Scalable Fault-Tolerant Quantum Computing 08/05/25 | Semiconductor Digest Button Oxford Ionics Unveils Roadmap to Scalable Fault-Tolerant Quantum Computing 08/05/25 | HPC Wire Button Oxford Ionics Unveils Multi-Phase Roadmap Toward Scalable, Fault-Tolerant Quantum Computing 08/05/25 | Quantum Computing Report Button ON LINKEDIN ALL MEDIA COVERAGE > WHERE TO FIND US There are no upcoming events that fit this criteria just now, please try again later! All upcoming events UK US Europe SXSW London 2025 2-7 JUN 2025 London, UK GO TO EVENT WEBSITE 56th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics (DAMOP) 16-20 JUN 2025 Portland, OR, USA GO TO EVENT WEBSITE 8th European Conference on Trapped Ions (ECTI) 8-12 SEP 2025 Amsterdam, Netherlands GO TO EVENT WEBSITE SPIE Quantum Catalyst 2025 12-13 NOV 2025 Boulder, CO, USA GO TO EVENT WEBSITE ISC High Performance 2025 10-13 JUN 2025 Hamburg, Germany GO TO EVENT WEBSITE 15th European Conference on Atoms Molecules and Photons 30 JUN - 4 JUL 2025 Innsbruck, Austria GO TO EVENT WEBSITE Quantum.Tech Europe 2025 29-30 SEP 2025 Rotterdam, Netherlands GO TO EVENT WEBSITE SuperComputing 2025 16-21 NOV 2025 St. Louis, MO, USA GO TO EVENT WEBSITE GRC Atoms and Molecules, Precision Measurements and Quantum Science 2025 15-20 JUN 2025 Salve Regina University, RI, USA GO TO EVENT WEBSITE IEEE Quantum Week 2025 31 AUG - 5 SEP 2025 Albuquerque, NM, USA GO TO EVENT WEBSITE UK National Quantum Technologies Showcase 2025 7 NOV 2025 London, UK GO TO EVENT WEBSITE Q2B Silicon Valley 2025 9-11 DEC 2025 Santa Clara, CA, USA GO TO EVENT WEBSITE GRC Atoms and Molecules, Precision Measurements and Quantum Science 2025 15-20 JUN 2025 Salve Regina University, RI, USA GO TO EVENT WEBSITE SPIE Quantum Catalyst 2025 12-13 NOV 2025 Boulder, CO, USA GO TO EVENT WEBSITE 56th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics (DAMOP) 16-20 JUN 2025 Portland, OR, USA GO TO EVENT WEBSITE SuperComputing 2025 16-21 NOV 2025 St. Louis, MO, USA GO TO EVENT WEBSITE IEEE Quantum Week 2025 31 AUG - 5 SEP 2025 Albuquerque, NM, USA GO TO EVENT WEBSITE Q2B Silicon Valley 2025 9-11 DEC 2025 Santa Clara, CA, USA GO TO EVENT WEBSITE SXSW London 2025 2-7 JUN 2025 London, UK GO TO EVENT WEBSITE UK National Quantum Technologies Showcase 2025 7 NOV 2025 London, UK GO TO EVENT WEBSITE SXSW London 2025 2-7 JUN 2025 London, UK GO TO EVENT WEBSITE 8th European Conference on Trapped Ions (ECTI) 8-12 SEP 2025 Amsterdam, Netherlands GO TO EVENT WEBSITE ISC High Performance 2025 10-13 JUN 2025 Hamburg, Germany GO TO EVENT WEBSITE Quantum.Tech Europe 2025 29-30 SEP 2025 Rotterdam, Netherlands GO TO EVENT WEBSITE 15th European Conference on Atoms Molecules and Photons 30 JUN - 4 JUL 2025 Innsbruck, Austria GO TO EVENT WEBSITE UK National Quantum Technologies Showcase 2025 7 NOV 2025 London, UK GO TO EVENT WEBSITE

We are world-leading innovators, creating the unique technologies which will bring Quantum Computing from the theoretical to the indispensable. Events Learn where to find us: All upcoming events UK US Europe SXSW London 2025 2-7 JUN 2025 London, UK GO TO EVENT WEBSITE 56th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics (DAMOP) 16-20 JUN 2025 Portland, OR, USA GO TO EVENT WEBSITE 8th European Conference on Trapped Ions (ECTI) 8-12 SEP 2025 Amsterdam, Netherlands GO TO EVENT WEBSITE SPIE Quantum Catalyst 2025 12-13 NOV 2025 Boulder, CO, USA GO TO EVENT WEBSITE ISC High Performance 2025 10-13 JUN 2025 Hamburg, Germany GO TO EVENT WEBSITE 15th European Conference on Atoms Molecules and Photons 30 JUN - 4 JUL 2025 Innsbruck, Austria GO TO EVENT WEBSITE Quantum.Tech Europe 2025 29-30 SEP 2025 Rotterdam, Netherlands GO TO EVENT WEBSITE SuperComputing 2025 16-21 NOV 2025 St. Louis, MO, USA GO TO EVENT WEBSITE GRC Atoms and Molecules, Precision Measurements and Quantum Science 2025 15-20 JUN 2025 Salve Regina University, RI, USA GO TO EVENT WEBSITE IEEE Quantum Week 2025 31 AUG - 5 SEP 2025 Albuquerque, NM, USA GO TO EVENT WEBSITE UK National Quantum Technologies Showcase 2025 7 NOV 2025 London, UK GO TO EVENT WEBSITE Q2B Silicon Valley 2025 9-11 DEC 2025 Santa Clara, CA, USA GO TO EVENT WEBSITE GRC Atoms and Molecules, Precision Measurements and Quantum Science 2025 15-20 JUN 2025 Salve Regina University, RI, USA GO TO EVENT WEBSITE SPIE Quantum Catalyst 2025 12-13 NOV 2025 Boulder, CO, USA GO TO EVENT WEBSITE 56th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics (DAMOP) 16-20 JUN 2025 Portland, OR, USA GO TO EVENT WEBSITE SuperComputing 2025 16-21 NOV 2025 St. Louis, MO, USA GO TO EVENT WEBSITE IEEE Quantum Week 2025 31 AUG - 5 SEP 2025 Albuquerque, NM, USA GO TO EVENT WEBSITE Q2B Silicon Valley 2025 9-11 DEC 2025 Santa Clara, CA, USA GO TO EVENT WEBSITE SXSW London 2025 2-7 JUN 2025 London, UK GO TO EVENT WEBSITE UK National Quantum Technologies Showcase 2025 7 NOV 2025 London, UK GO TO EVENT WEBSITE SXSW London 2025 2-7 JUN 2025 London, UK GO TO EVENT WEBSITE 8th European Conference on Trapped Ions (ECTI) 8-12 SEP 2025 Amsterdam, Netherlands GO TO EVENT WEBSITE ISC High Performance 2025 10-13 JUN 2025 Hamburg, Germany GO TO EVENT WEBSITE Quantum.Tech Europe 2025 29-30 SEP 2025 Rotterdam, Netherlands GO TO EVENT WEBSITE 15th European Conference on Atoms Molecules and Photons 30 JUN - 4 JUL 2025 Innsbruck, Austria GO TO EVENT WEBSITE UK National Quantum Technologies Showcase 2025 7 NOV 2025 London, UK GO TO EVENT WEBSITE

We are world-leading innovators, creating the unique technologies which will bring Quantum Computing from the theoretical to the indispensable. Media coverage Quantum Computing Roadmaps: A Look at The Maps And Predictions of Major Quantum Players 16/05/25 | The Quantum Insider Button Oxford Ionics’ development roadmap to scalable fault-tolerant quantum computing 08/05/25 | Electronic Specifier Button Oxford Ionics Unveils Development Roadmap to Scalable Fault-Tolerant Quantum Computing 08/05/25 | Semiconductor Digest Button Oxford Ionics Unveils Roadmap to Scalable Fault-Tolerant Quantum Computing 08/05/25 | HPC Wire Button Oxford Ionics Unveils Multi-Phase Roadmap Toward Scalable, Fault-Tolerant Quantum Computing 08/05/25 | Quantum Computing Report Button Oxford Ionics Unveils Development Roadmap to Scalable Fault-Tolerant Quantum Computing 08/05/25 | The Quantum Insider Button Meet the companies racing to build quantum chips 05/05/25 | TechCrunch Button £1.65m to develop Quantum Testbed 23/04/25 | Electronics Weekly Button The race is on for supremacy in quantum computing 22/04/25 | The Times Button Innovate UK grant to develop quantum testbed 22/04/25 | Business Cloud Button UK invests £1.65M in open architecture quantum testbed to accelerate interoperable quantum computing 22/04/25 | Tech EU Button TreQ-Led Consortium Awarded £1.65M ($2.2M USD) Innovate UK Grant to Develop Open Architecture Quantum Testbed 22/04/25 | Quantum Computing Report Button TreQ to Develop Modular Quantum Testbed with Rigetti, Oxford Ionics, and Others 22/04/25 | HPC Wire Button US’ Department of Defense picks pioneering Oxford tech company to push quantum computing boundaries 22/04/25 | Insider Media Button 10 quantum computing startups to watch, according to VCs 18/04/25 | Sifted Button Colorado doubles down on quantum technology despite federal funding questions 15/04/25 | The Colorado Sun Button The thrill of quantum in 2025 14/04/25 | EE News Europe Button Don’t have a PhD? The quantum industry still wants you 10/04/25 | Physics World Button Best universities for spinouts 10/04/25 | Growth Business Button Quantinuum and Oxford Ionics in DARPA elite for Quantum Benchmarking Initiative 09/04/25 | Business Weekly Button LOAD MORE

Our people are the key to our success. Their expertise, wellbeing, and passion have a significant impact on everything we do, and ultimately on our success as a company. OUR PEOPLE MEET THE TEAM Our people are the key to our success LEARN MORE . Building a full-stack quantum computer is not just a physics problem, nor is it just an engineering problem or just a computer science problem: it’s a messy combination of all these things. We are experts in the messy spaces in between these fields . LEADERSHIP Leadership EXECUTIVE TEAM Dr Chris Ballance and Dr Tom Harty FOUNDERS: CEO & CTO Chris (CEO) and Tom (CTO) have been working together at the forefront of Quantum Computing for over a decade. They earned their PhDs in Quantum Computing from the University of Oxford focussing on trapped ion quantum computing. During this time they set world records including the highest performance quantum logic gates, longest qubit memory coherence time, fastest and highest performance quantum network. They founded Oxford Ionics in 2019 to continue the journey towards world-changing quantum computers. Dylan Murphy CFO Dylan is a Chartered Accountant and fellow of the ICAEW with a MA in Economics from the University of Cambridge. He has over 10 years experience in startups, following finance leadership roles in larger corporations such as KPMG and TalkTalk. Chris Goodings VP ENGINEERING Chris has over two decades of experience managing high-performing engineering teams and implementing product roadmaps at disruptive businesses. With a PhD in Physics from the University of Cambridge, Chris’ background includes senior positions at leading semiconductor companies including NVIDIA and Graphcore. OUR TEAMS Teams Our people are the key to our success. Their expertise, wellbeing, and passion have a significant impact on everything we do, and ultimately on our success as a company. SCIENCE ENGINEERING INFRASTRUCTURE OPERATIONS Our science team is made up of some of the best minds in the quantum computing world. They work on every level of our quantum computer design: from designing microchips, to developing novel quantum logic gates, to planning how we will architect the 1000+ qubit devices of the future. From cutting-edge design to hands-on prototyping, our engineering teams work across disciplines from software, to photonics and electronics, to design and build our state-of-the-art quantum systems. Working across lasers, vacuum systems, mechanics and electronics, our infrastructure team designs, builds and maintains the systems that underpin every aspect of our technology. Our operations and finance teams are working across the organisation to ensure everything is running smoothly and that we’re successfully executing our vision. From restocking the fridge to managing our funding rounds, recruiting new team members to running company events - Ops and Finance lead on everything that isn’t actually building Quantum Computers. OUR PEOPLE Meet some of the team David Allcock DIRECTOR OF SCIENCE FOR NORTH AMERICA David heads up our US office and is an expert in electronic qubit control technology. He holds an Assistant Professorship at the University of Oregon, previously worked in the storied Ion Storage Group at NIST, and has a PhD from The University of Oxford. MEET THE TEAM Join the team We are always looking for talented people to join the Oxford Ionics team. If you're passionate and great at what you do, we want you. JOIN US OUR PEOPLE LEADERSHIP OUR TEAMS MEET THE TEAM

We'd love to hear from you! Discover how to get in touch and where to find us. Schedule a meeting with us . Schedule a meeting with us to learn more about Oxford Ionics and our quantum computing platform. Fill out the form below to request a meeting, and we will get back to you as soon as possible. Full name (first and last) Business email Company Your message What would you like to discuss with us? SEND MESSAGE For general enquiries, fill in the form above or email us directly on info@oxionics.com . For sales enquiries, please use the above form or contact sales@oxionics.com . For press enquiries, contact us on media@oxionics.com . For information on career opportunities, h ead over to the careers page or get in touch with us on careers@oxionics.com . UK Head Office Oxford Ionics Unit 6a, Oxford Technology Park Technology Dr Oxford OX5 1GN United Kingdom We prefer to communicate by email, but if you want to get in touch by phone, then you can reach us on +44(0) 1865 649842 US Office Oxford Ionics Colorado Building 1919 14th St #700 Boulder, CO 80302 USA - quantum computing - ion trap - ion trapping - ion trap quantum computing - oxford quantum Registered address: Oxford Ionics Ltd, Oxford Technology Park, Oxford, OX5 1GN, United Kingdom

We are world-leading innovators, creating the unique technologies which will bring Quantum Computing from the theoretical to the indispensable. Blog LATEST 8 May 2025 Unveiling Oxford Ionics’ development roadmap to scalable fault-tolerant quantum computing READ MORE 7 MINUTE READ ALL Engineering margin: The hidden factor that separates demo from deployment 6 May 2025 4 MINUTE READ How do you build a quantum chip? 4 Apr 2025 4 MINUTE READ Spotlight on Bryce Bjork 1 May 2025 5 MINUTE READ The tyranny of calibration in quantum computing 11 Apr 2025 5 MINUTE READ

Our qubits are individual atoms - we remove one of their electrons to make ions, allowing us to hold them less than the width of a human hair above our ion-trap chips. OUR TECHNOLOGY Lau nching a new age of computing LEARN MORE . THE FUTURE IS QUANTUM The future is quantum Quantum computers are the most powerful form of computer that the laws of nature allow. At their heart are the quantum bits - qubits - which give quantum computers the power to solve problems no other computers can. OUR TECHNOLOGY OUR TECHNOLOGY Trapped ions and electronic control Our qubits are individual atoms, the universe’s closest approximation of a perfect quantum system. We remove one of their electrons to make ions, allowing us to hold them less than the width of a human hair above our ion-trap chips. Until now, trapped ion-computers have largely relied on lasers to control the qubits. This approach performs well for small processors, but becomes untenable and error-prone as the size of the processor scales, and the number of qubits increases. Instead of lasers, Oxford Ionics’ trapped-ion processors use a proprietary, patented Electronic Qubit Control (EQC) system to control the qubits. This allows us to combine the unrivalled quantum performance of individual atoms with the scalability and reliability of electronics integrated into silicon chips. OUR APPROACH OUR APPROACH TO QUANTUM Better beats bigger Is a quantum computer with 1,000,000 qubits better than one with 100 qubits? It depends on how good the qubits are and how they’re wired up: the error rate and connectivity. A quantum processor chip with just a few hundred perfect qubits can solve problems beyond the reach of any supercomputer, but if the qubits aren’t good enough the same problem can take a machine the size of a warehouse. Everything we do at Oxford Ionics is about building better, not just bigger, quantum computers. That’s why we build our devices with complete connectivity between qubits, and use the technology which has the lowest error rates ever demonstrated. Controlling our qubits using electronics integrated into silicon chips allows us to do this with processors built in the same factories that make chips for cars and phones. Why us WHY US? Pioneering performance Oxford Ionics is built on decades of leadership at Oxford University, home to some of the first pioneers of Quantum Computing and birthplace of Quantum Error Correction. We define the frontiers of what’s possible, with our team setting numerous world records including best quantum gates, longest quantum memory coherence times, and best quantum networks demonstrated anywhere in the world, in any technology. We accomplish things no one else can by bringing together the best physicists and engineers to build a completely new kind of technology. LEARN ABOUT OUR TEAM > THE FUTURE IS QUANTUM OUR TECHNOLOGY Why us OUR APPROACH OUR TECHNOLOGY

Oxford Ionics are world-leading innovators, creating the unique technologies which will bring Quantum Computing from the theoretical to the indispensable. Delivering the world's most powerful quantum computers We're combining our high-performance trapped-ion platform with semiconductor supply chains for scalable, market-ready quantum systems. Our technology Contact sales What we do Quantum computers are the most powerful form of computer that the laws of nature allow. Quantum computing will improve productivity, sustainability and quality of life by transforming our ability to tackle real-world problems across fields including chemistry, logistics and finance. Only one technology platform has achieved the performance needed to unlock this massive potential: Trapped Ions. …but ions have been hard to scale. Until now. Oxford Ionics' unique approach combines the world-leading performance of trapped ion qubits with the scalability of semiconductor manufacturing. We create quantum computers with unparalleled performance that scales. OUR TECH OUR TEAM CAREERS NEWSROOM Latest news 08/05/25 Oxford Ionics Unveils Development Roadmap to Scalable Fault-Tolerant Quantum Computing Oxford Ionics today announced its development roadmap to achieve scalable fault-tolerant quantum computing. Oxford Ionics Unveils Development Roadmap to Scalable Fault-Tolerant Quantum Computing 03/04/25 DARPA selects Oxford Ionics Quantum Benchmarking Initiative Oxford Ionics, a world leader in trapped-ion quantum computing, today announced it has been selected by the United States’ Defense Advanced Research Projects Agency (DARPA) for its Quantum Benchmarking Initiative (QBI). DARPA selects Oxford Ionics Quantum Benchmarking Initiative 18/03/25 UK Science Minister Opens Oxford Ionics HQ Lord Patrick Vallance, Minister of State for Science, Research, and Innovation officiated the grand opening of the new HQ located in Oxford. UK Science Minister Opens Oxford Ionics HQ GO TO NEWSROOM > Latest news OUR TECHNOLOGY Launching a new age of computing FIND OUT MORE > OUR TEAM Our people are the key to our success FIND OUT MORE > Join the team We are always looking for talented people to join the Oxford Ionics team. If you're passionate and great at what you do, we want you. JOIN US

At Oxford Ionics we are always looking for determined, motivated, and ambitious individuals to work with us. CAREERS Disc over y our pote ntial CURRENT VACANCIES LEARN MORE . WORKING WITH US A quantum leap in your career Our team is the foundation of our success, and we're seeking talented, enthusiastic individuals who share our vision and passion. Join us to work alongside world-class scientists and engineers, tackling the biggest challenges in quantum computing. We are dedicated to pushing the boundaries of science, shaping the future of quantum technology and leading the global push towards quantum computing. To achieve this, we need the very best skills, and in return, we offer an exciting journey at the cutting edge of the technological revolution. WHY 2 WORKING WITH US Shape the future We're organised into eight teams, each focusing on a unique part of our mission to create the world's most powerful, accurate, and reliable quantum systems. We leverage expertise in our highly collaborative environment to tackle complex engineering and scientific challenges. Discover where you can best contribute your skills to achieve our mission and make a significant impact. QUANTUM SCIENCE & ENGINEERING QUANTUM PROCESSOR ENGINEERING SOFTWARE ENGINEERING QUANTUM INFRASTRUCTURE OPERATIONS & FINANCE QUANTUM ARCHITECTURE STRATEGY ELECTRONICS WHY 3 WORKING WITH US Our culture We promote a culture of excellence, determination, and innovation where everyone feels respected and valued. We work on very difficult problems but also take time to unwind through our regular social events. These include our family-friendly summer party and a winter retreat to celebrate our achievements and connect with colleagues and their families. JOIN THE TEAM Open Positions Please find a list of our current job openings below; click on job titles to be taken to the job application page. We're always looking for exceptional talent as we expand our team in the US. If you're interested in opportunities in Boulder, Colorado, we'd love to hear from you. Explore our open positions, and if nothing fits right now, feel free to contact our talent team at careers@oxionics.com . Benefits We are leading the way in quantum technology and need skilled, innovative individuals like you. We offer our UK employees a wide range of benefits and aim to extend these to our US team wherever possible. These include: Employee Share Options You will be eligible to receive an award of Employee Share Options, which will vest over your employment and allow you to participate in the company's success. Enhanced Pension We operate a defined contribution pension scheme where we match contributions of up to 7% towards your pension. Enhanced New Parent Leave Our gender-neutral policy gives up to 26 weeks on full pay for anyone welcoming a new child to the family, whether through birth, adoption, fostering, surrogacy or otherwise. Generous Annual Leave The wellbeing of our team is important to us. As part of our flexible work policy, everyone receives 30 days of annual leave plus bank holidays. Flexible Working We recognise that everyone's needs are unique, and our approach to work reflects this understanding. Depending on your role, you can choose either an on-site or hybrid format with flexible working hours around our core hours. Private Dental Insurance We provide comprehensive dental insurance and cover 100% of the premium for our employees. Private Medical Insurance We provide comprehensive, excess-free, history-disregarded private medical insurance, offering the highest level of coverage for you and your family. Group Life Assurance We care about your wellbeing and your family. Our policy provides financial security by offering a payment of five times your salary in the event of your death, ensuring peace of mind for your loved ones. Free Lunches Daily We provide lunch options, healthy snacks and treats every day, catering for all preferences and dietary requirements. OUR PRINCIPLES Equality, Diversity & Inclusion We are committed to equality, diversity, and inclusion because we believe that integrating diverse experiences, ideas, and perspectives within our team drives innovation. OUR COMMITMENT Our strength lies in our diversity. Our commitment to equality, diversity, and inclusion is integral to our mission of creating groundbreaking quantum computing technology. We strive to build an inclusive environment where every team member feels valued, respected, and empowered, regardless of race, ethnicity, gender, age, religion, ability, sexual orientation, or gender identity. OUR APPROACH We have established policies and practices to ensure all team members have equal opportunities to thrive. We prioritise creating a supportive and welcoming workplace where diverse perspectives are not only heard but celebrated and where continuous learning is promoted. We empower our employees to bring their authentic selves to work by encouraging open dialogue and creating an environment where everyone can succeed. OUR ACTIONS We turn our commitment into actions. We regularly review and update our policies to reflect our dedication to equality, diversity, and inclusion. We partner with professional networks to stay updated on best practices and actively participate in events that promote these values. We conduct regular assessments to measure our progress and maintain accountability through transparent reporting. We offer enhanced benefits such as gender-neutral parental leave, flexible working options, and uncapped annual leave to support our team's diverse needs. JOIN THE TEAM Career FAQs DO YOU OFFER VISA SPONSORSHIP? Yes, we can support some of our UK-based positions with working visas and hire individuals from around the globe. Our Talent Team can discuss this further during the recruitment process. DOES OXFORD IONICS SUPPORT INTERNSHIPS? Unfortunately, due to our current research commitments and operational capacity, we’re unable to provide internships or placements at this time. This may change in the future, so please keep an eye on our careers page for new opportunities. DO YOU OFFER HYBRID WORKING? Each position is unique and may require different time spent in the office and laboratories. We are happy to discuss supporting fully remote work on a case-by-case basis for certain positions. Please add details on this topic to your application. DO YOU HAVE ANY OTHER APPLICATION TIPS? We want to get to know your authentic self, your skills, and your experience. Highlight your motivations and how you could bring value to the business. WHAT IF I DON'T SEE A POSITION I QUALIFY FOR? We’re always excited to hear from people who might be interested in future opportunities, so please get in touch. You can send a speculative CV or start an informal chat with our Talent Team by contacting careers@oxionics.com . DO YOU WORK WITH RECRUITMENT AGENCIES? Our internal Talent Team doesn’t accept inbound CVs from external parties or recruitment agencies. Any unsolicited CVs sent to us will be treated as the property of Oxford Ionics, and any attached terms and conditions will be null and void. JOIN THE TEAM CAREERS WORKING WITH US JOIN THE TEAM BENEFITS INCLUSION Career FAQs CURRENT VACANCIES

Back to all blogs 6 May 2025 Engineering margin: The hidden factor that separates demo from deployment Maciej Malinowski, Quantum Architecture Team Lead 4 MINUTE READ When evaluating quantum computers, performance is usually determined by two-qubit gate errors. Of course other metrics exist – qubit count, single-qubit gate errors, T1 times also matter. But two-qubit gate errors are typically the bottleneck to powerful quantum computing, and therefore are seen as a ‘super metric’ when describing any quantum computer. At Oxford Ionics, we work towards a pioneering technology roadmap that includes achieving a two-qubit gate error rate of less than 0.0001 – that is, a fidelity of 0.9999 or ‘four nines’. This goal is an order of magnitude more ambitious than most of the other players in the market who typically aim for fidelities between 0.99 and 0.999. The reason for this discrepancy is that in principle, Quantum Error Correction (QEC) only requires fidelity above about ‘two nines’ or 0.99. So to some, ‘four nines’ may seem like an overkill – take for example a comment we received off the back of announcing our record-breaking fidelity results last year: So, are we beating a dead horse here? Not at all. We could (and likely will!) spend several blog posts discussing the tremendous benefits of achieving ‘four nines’ over ‘two nines’, including how it enables: The potential for unlocking early quantum advantage in the pre-fault-tolerant (a.k.a NISQ) regime A reduction in the physical-to-local encoding ratio in the surface code, unlocking the ability to use low overhead but low threshold qLDPC codes – in turn bringing the timelines of fault-tolerant quantum computers forward by several years Our ability to solve meaningful problems with up to 10,000x fewer physical qubits – allowing us to deliver systems faster, take up less physical footprint, and significantly reduce power consumption But actually ‘four nines’ gives us something even more impactful, something that frequently goes unmentioned when discussing how to build quantum computers: it gives us engineering margin. Why engineering margin matters Margin - or the difference between a design parameter’s minimum requirements for functionality and its actual capability - is one of the most important concepts in engineering, and in essence the key difference between industrial products and academic demonstrations. Let’s say we wanted to design an elevator to carry a human. In theory, one could argue that 95% of humans weigh below 150 kg – therefore, we can hang an elevator on a rope rated for 150kg, slap a warning sign in front, and call it a day. That setup may suffice for a Proof of Concept demonstration, but we can universally acknowledge that it would be a terrible product. Why? Because it leaves no margin. In device engineering, margin is required because as devices grow in scale and complexity, their performance always gets more nuanced and slightly less controlled. Quantum computers are no exception – if a quantum computer operates right at the margin of acceptable error, then increasing the qubit number will make it even more marginal. This, in turn, means that larger quantum computers require more cumbersome calibrations, more detailed simulations, more design iterations, and more fabrication runs. The only way to build large quantum computers soon is to develop quantum computing technology with plenty of performance margin. At Oxford Ionics, we believe ‘four nines’ gives us this margin, whereas ‘two nines’ or even ‘three nines’ fall short. For example, a recent paper examined the challenge of building large fault-tolerant quantum computers with superconducting qubits. It found that even though the mean two-qubit gate fidelities of many of today’s superconducting quantum computers are above 0.99, they are insufficient for fault-tolerance. This was in part because the “worst qubit” is significantly lower-performing than the “average qubit”. In other words, there is currently insufficient margin between the average two-qubit error rate and the fault-tolerance threshold required to scale the device to large and useful sizes. The authors conclude that, to get sufficient margin, the target average two-qubit gate fidelity should be…around ‘four nines’! Tackling engineering margin at Oxford Ionics To summarise, achieving ‘four nines’ of fidelity from the get-go gives us plenty of engineering margin, dramatically increasing the confidence with which we can guarantee our quantum computers behave fault-tolerantly when operated at a large scale and with full feature integration. However, our focus on error rates is just one of many examples of margin-focused engineering at Oxford Ionics. In future blog posts, we will discuss other examples of engineering solutions designed to help our quantum computers maintain performance during scale up, from coherent control techniques that reduce quantum gate calibration sensitivity, to integrated near-field antenna designs with a high degree of tolerance, to chip fabrication imperfections. And in the end, margin does not simply affect the error rates – it impacts the entire quantum computer deployment, from fabrication yield to device uptime and robustness. Thus, when we turn our focus to engineering margin, it’s not so that we can have the best science experiment of them all. It’s to ensure that our customers receive ongoing value from first deployment all the way to fault tolerant quantum computing. PREVIOUS NEXT

Oxford Ionics today announced it has appointed Chris Goodings as VP Engineering. Newsroom 18 October 2024 Oxford Ionics Appoints Chris Goodings as VP Engineering Oxford Ionics today announced it has appointed Chris Goodings as VP Engineering. Chris brings two decades of engineering experience to Oxford Ionics, and will oversee the company’s growing technical teams OXFORD, 18th October, 2024: Oxford Ionics, a world leader in trapped-ion quantum computing, today announced it has appointed Chris Goodings as its VP Engineering. Chris will oversee the company’s growing technical departments, including its Quantum Science & Engineering, Quantum Infrastructure, and Software Development teams. Chris has over two decades of experience managing high-performing engineering teams and implementing product roadmaps at disruptive businesses. With a PhD in Physics from the University of Cambridge, Chris has held senior positions at leading semiconductor companies, including NVIDIA and Graphcore. At Oxford Ionics, Chris will be responsible for the science and engineering teams as they execute an ambitious roadmap to build the world’s most powerful, commercially-valuable quantum computers. Oxford Ionics has grown to 60 employees worldwide across its main offices in Oxford, UK and Boulder, CO, and expects to triple headcount in the next 18 months. Chris’ appointment comes off the back of a landmark year for Oxford Ionics. Earlier this year, the company set world records in the three most important metrics for quantum computing performance: single gate fidelity, two-qubit gate fidelity , and quantum state preparation and measurement (SPAM) . It also rapidly commercialised its quantum computers, selling systems to customers including the UK’s National Quantum Computing Centre (NQCC) and Germany’s Cyberagentur. Tom Harty, Oxford Ionics co-founder and CTO, commented : “I'm thrilled to have Chris Goodings joining as VP Engineering. As a founder of a deeptech business, one of the most important things you do is getting the right technical leadership and with Chris we have a world-class fit. He has an impressive track record of bringing disruptive technologies to market at speed and scale — combined with our quantum expertise and vision, Chris will supercharge our engineering efforts. I'm excited to be working with him as we enter this next phase in our journey to build the world’s most powerful quantum computers.” On his appointment, Chris Goodings commented : “From my first conversations with Oxford Ionics, I was struck by both the passion for innovation and the promise of its technology. The company is at the forefront of bringing market-catalysing quantum computers to life, and I am excited to be joining the team on the next stage of this journey. I’m looking forward to helping shape Oxford Ionics’ world-class science and engineering teams so that they continue to hit the engineering milestones required to bring quantum computing to commercial reality.” About Oxford Ionics Oxford Ionics was co-founded in 2019 by Dr Tom Harty and Dr Chris Ballance who both hold world records in quantum breakthroughs. The team includes 60 global experts across physics, quantum architecture, engineering and software and expects to triple headcount over the next 18 months as the business scales internationally. Oxford Ionics has raised £37 million to date with investors including Braavos, OSE, Lansdowne Partners, Prosus Ventures, 2xN, and Hermann Hauser (founder of chip giant ARM). In 2024, Oxford Ionics rapidly commercialised its technology, selling full-stack quantum computers to the UK’s National Quantum Computing Centre (NQCC) and Germany’s Cyberagentur. The company also holds the world records in the three most important metrics for quantum performance: single- and two-qubit gate fidelity and quantum state preparation and measurement (SPAM). For more information, visit our website www.oxionics.com Press Contacts GENERAL PRESS ENQUIRIES media@oxionics.com ON SOCIAL MEDIA

Today we announce that Oxford Ionics has won a £6m contract to supply a quantum computer to the UK’s National Quantum Computing Centre (“NQCC”) in Harwell, Oxfordshire. Newsroom 5 February 2024 Oxford Ionics wins contract to deliver a quantum computer to the NQCC Today we announce that Oxford Ionics has won a £6m contract to supply a quantum computer to the UK’s National Quantum Computing Centre (“NQCC”) in Harwell, Oxfordshire. The NQCC is the UK's national lab for quantum computing. Its goal is to accelerate the development of the UK’s quantum computing capabilities and infrastructure, to drive innovation and enhance UK capabilities in the sector. Oxford Ionics will deliver the system, named “Quartet”, to the NQCC’s Harwell facility where the NQCC team will use it to develop applications with partners across academia, industry and government, and to carry out research and application development to inform their technology roadmap. Quartet is a full-stack quantum computer housing one of our record-breaking trapped-ion quantum processor units (“QPUs”) at its heart. Scalability is core to the design of our quantum systems: all of our quantum computers are field-upgradeable to QPUs powerful enough to solve world-changing problems. All Oxford Ionics devices have complete connectivity between qubits, and use the qubit technology which has the lowest error rates ever demonstrated. Our chips are compatible with existing scalable fabrication (CMOS) techniques thanks to our patented, integrated Electronic Qubit Control (EQC) system and ground-breaking control architecture. We have partnered with Infineon Technologies to fabricate our devices in commercial semiconductor foundries. This will be the fifth quantum computer built by Oxford Ionics. Our first four systems are located in our HQ in Oxford and available through the cloud to select partners. We are excited to deliver our first on-premise quantum computer and the NQCC is an ideal partner for that. If your company would make a good fit for our partnership programme, please drop us a line here . Read the UK Government’s announcement here . Press Contacts GENERAL PRESS ENQUIRIES media@oxionics.com ON SOCIAL MEDIA