About IonQ:
IonQ, Inc. [NYSE: IONQ] is the world’s leading quantum platform and merchant supplier - delivering integrated quantum solutions across computing, networking, sensing, and security. IonQ’s newest generation of quantum computers, the IonQ Tempo, is the latest in a line of cutting-edge systems that have been helping customers and partners including Amazon Web Services, and AstraZeneca achieve 20x performance results and accelerate innovation in drug discovery, materials science, financial modeling, logistics, cybersecurity, and defense. In 2025, the company achieved 99.99% two-qubit gate fidelity, setting a world record in quantum computing performance.
Headquartered in College Park, Maryland, IonQ has operations in California, Colorado, Massachusetts, Tennessee, Washington, Italy, South Korea, Sweden, Switzerland, Canada, and the United Kingdom. Our quantum computing services are available through all major cloud providers, while we also meet the needs of networking and sensing customers across land, sea, air, and space. IonQ is making quantum platforms more accessible and impactful than ever before.
At Oxford Ionics, now part of IonQ, we are building the first practical quantum computer. As a Senior Mechanical Engineer on the Reliability Engineering team, you’ll keep our quantum computers running at their best, boosting fleet uptime and cutting operating cost.
You’ll work closely with electrical, optical and science colleagues as part of a supportive, collaborative team, updating mechanical designs and managing configuration so their system improvements can land.
Responsibilities:Your focus will be the live fleet. You will root-cause mechanical, vacuum, cryogenic and thermal faults on running systems, prioritise issues by their impact on uptime, and analyse failed parts to track recurring failure modes.
Where a challenge keeps coming back, you will design, prototype and test the solution, then write the assembly and upgrade instructions that bring the new design into existing fleets, working with our operations team to get upgrades implemented into live systems. You will keep the product lifecycle management (PLM) system, build records and engineering change requests (ECRs) up to date so fixes carry into future builds.
Key responsibilities include:- Root-cause mechanical, vacuum, cryogenic and thermal faults on live systems, prioritising issues by impact on uptime.
- Design, prototype and test solutions to recurring challenges.
- Implement mechanical changes that enable electrical and optical improvements.
- Write assembly and upgrade instructions to bring new designs into existing fleets, and work with our operations team to implement upgrades in live systems.
- Analyse failed parts, track recurring failure modes and update the PLM system, build records and ECRs so fixes carry into future builds.
You will be a mechanical engineer with a strong design background and 4+ years of relevant industry experience. A degree in Mechanical Engineering or a related field, or equivalent practical experience (including apprenticeship routes), is expected.
You are proactive and self-directed, happy to ask for input, and comfortable working on systems where uptime matters while collaborating across disciplines.
Quantum experience is not required. We will teach you the rest, and if you meet most of this posting and the work excites you, we encourage you to apply.
You’d be a great fit with:- Established CAD ability, ideally SolidWorks, plus geometric dimensioning and tolerancing (GD&T) and PLM experience.
- Experience with cryogenic, vacuum, or optomechanical systems.
- Structured root cause and failure analysis (e.g. 5 Whys, failure mode and effects analysis).
- Ability to explain technical trade-offs across disciplines.
The total compensation package includes base salary, bonus, equity, and a range of benefits available on our career site.
Compensation will vary based on individual factors such as education, qualifications, and experience of the final candidate(s), specific office location, and calibration against relevant market data and internal team equity. Posted base salary figures are subject to change as new market data becomes available. Our benefits include comprehensive medical, dental, and vision plans, matching 401(k), unlimited PTO and paid holidays, parental/adoption leave, legal insurance, and a home technology stipend. Details of participation in these benefit plans will be provided when a candidate receives an offer of employment.
At IonQ, we believe in fair treatment, access, opportunity, and advancement for all while striving to identify and eliminate barriers. We empower employees to thrive by fostering a culture of autonomy, productivity, and respect. We are dedicated to creating an environment where individuals can feel welcomed, respected, supported, and valued.
We are committed to equity and justice. We welcome different voices and viewpoints and do not discriminate on the basis of race, religion, ancestry, physical and/or mental disability, medical condition, genetic information, marital status, sex, gender, gender identity, gender expression, transgender status, age, sexual orientation, military or veteran status, or any other basis protected by law. We are proud to be an Equal Employment Opportunity employer.
US Technical Jobs. The position you are applying for will require access to technology that is subject to U.S. export control and government contract restrictions. Employment with IonQ is contingent on either verifying “U.S. Person” (e.g., U.S. citizen, U.S. national, U.S. permanent resident, or lawfully admitted into the U.S. as a refugee or granted asylum) status for export controls and government contracts work, obtaining any necessary license, and/or confirming the availability of a license exception under U.S. export controls. Please note that in the absence of confirming you are a U.S. Person for export control and government contracts work purposes, IonQ may choose not to apply for a license or decline to use a license exception (if available) for you to access export-controlled technology that may require authorization, and similarly, you may not qualify for government contracts work that requires U.S. Persons, and IonQ may decline to proceed with your application on those bases alone. Accordingly, we will have some additional questions regarding your immigration status that will be used for export control and compliance purposes, and the answers will be reviewed by compliance personnel to ensure compliance with federal law.
US Non-Technical Jobs. Due to applicable export control laws and regulations, candidates must be a U.S. citizen or national, U.S. permanent resident (i.e., current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum. Accordingly, we will have some additional questions regarding your immigration status that will be used for export control and compliance purposes, and the answers will be reviewed by compliance personnel to ensure compliance with federal law.
If you are interested in being a part of our team and mission, we encourage you to apply!
Skills Required
- Mechanical engineer with a strong design background
- 4+ years of relevant industry experience
- Degree in Mechanical Engineering or a related field, or equivalent practical experience including apprenticeship routes
- Established CAD ability, ideally SolidWorks, with GD&T and PLM experience
- Experience with cryogenic, vacuum, or optomechanical systems
- Structured root-cause and failure analysis experience, such as 5 Whys or FMEA
- Ability to explain technical trade-offs across disciplines
IonQ Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about IonQ and has not been reviewed or approved by IonQ.
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Healthcare Strength — Health coverage is described as comprehensive, including medical, dental, and vision insurance, HSA options, and no-cost mental-health support. Company materials also cite strong premium coverage levels for employees and dependents in recent years.
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Parental & Family Support — Paid maternity, paternity, and bonding leave are presented as fully paid for eligible employees. This breadth of family support is emphasized across company and job materials.
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Retirement Support — A 401(k) with company match up to 5% is part of the package, with materials noting a relatively short vesting schedule. Retirement support is positioned as a core element of total rewards.
IonQ Insights
What We Do
Quantum computers are a revolutionizing technology — they have the potential to transform business, society, and the planet for the better, and IonQ is at the forefront of this revolution. After over 25 years of academic research, IonQ was founded in 2015 by Chris Monroe and Jungsang Kim with $2 million in seed funding from New Enterprise Associates, a license to core technology from the University of Maryland and Duke University, and the goal of taking trapped ion quantum computing out of the lab and into the market. In the following three years, we raised an additional $20 million from GV, Amazon Web Services, and NEA, and built two of the world’s most accurate quantum computers. In 2019, we raised another $55 million in a round led by Samsung and Mubadala, and announced partnerships with Microsoft and Amazon Web Services to make our quantum computers available via the cloud. In 2020 and 2021, we built additional generations of high performance quantum hardware, added Google Cloud Marketplace to our cloud partner roster and announced a series of collaborations and business partnerships with leading academic and commercial institutions. On October 1st, 2021, IonQ began trading as IONQ on the New York Stock Exchange, making it the world's first public pure-play quantum computing company. We remain hard at work realizing the world-changing potential of quantum computing.
Why Work With Us
We’re growing a passionate, diverse team of collaborative, creative people. We believe in pursuing innovative, challenging work with integrity, alongside team members we can learn from and grow with.
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