Senior Mechanical Engineer, Reliability

Job description

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. Role Overview Role: 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,…