Senior Mechanical Engineer, Reliability

The role

You will root-cause mechanical, vacuum, cryogenic and thermal faults on live quantum computer systems. You will design, prototype, and test solutions to recurring challenges and update mechanical designs to improve fleet uptime.

What you will do

• 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.
• Work with the operations team to implement upgrades in live systems.
• Analyse failed parts, track recurring failure modes and update the PLM system, build records and ECRs.

Required qualifications

• 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).

Nice to have

• 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.

Benefits

• Comprehensive medical, dental, and vision plans
• Matching 401(k)
• Unlimited PTO
• Paid holidays
• Parental/adoption leave
• Legal insurance
• Home technology stipend

Before you apply

• Employment is contingent on verifying U.S. Person status for export controls and government contracts work, obtaining any necessary license, and/or confirming the availability of a license exception u

About the company

IonQ, Inc. is the world’s leading quantum platform and merchant supplier delivering integrated quantum solutions. The company is headquartered in College Park, Maryland.