Staff Mechanical Engineer (QSS)

Infleqtion is a global quantum technology company solving the worlds most challenging problems. The company harnesses quantum mechanics to build and integrate quantum computers sensors and networks. From fundamental physics to leading edge commercial products Infleqtion enables quantum everywhere through our ecosystem of devices and platforms.

Infleqtion is seeking a system-level mechanical engineer to design the infrastructure mounting and environmental-survivability architecture that allows our Quantum Gravity Gradiometer (QGG) to transition from the laboratory to both terrestrial and space this role the candidate will work the structural mounting damping isolation thermal interfaces and mechanical integration needed for the QGG sensor head to survive launch handling transport and pre-launch microgravity testing while preserving the precision required for quantum measurement.

The role requires close collaboration with our prime customer(s) internal management researchers systems engineers optical and electrical engineers aerospace experts manufacturing partners suppliers and external contractors. The individual will actively engage customers and partners throughout the program lifecycle ensuring delivery against milestones and commitments while maintaining alignment with Infleqtions product lifecycle and quality standards. Cross-disciplinary engagement is expected with this role driving technical alignment across mechanical optical electrical systems and mission domains.

Job Responsibilities

The duties and responsibilities outlined below include essential functions of the role. Depending on business needs this role may perform a combination or all of the following duties. Duties responsibilities and activities may change or new ones may be assigned.

• Together with other mechanical engineers complete the design of the QGG sensor head and associated hardware so it can operate in development and microgravity test environments as well as terrestrial and space applications. This includes making disciplined trades among structural dynamics thermal performance optical alignment stability magnetic cleanliness mass packaging manufacturability and quantum-sensor performance.

• Present progress analyses risks design decisions and test results to senior management design-review boards and the end customer.

• Execute and direct the modeling simulation analysis and test-correlation efforts required to enable product performance including structural thermal modal vibration shock and tolerance analysis as appropriate.

• Responsible for the mechanical integration of sensor-head subsystems with optical electrical vacuum thermal fiber cable and external spacecraft or ground-test interfaces.

• Identify qualify and technically manage key suppliers for precision machined parts opto-mechanical hardware isolation/damping hardware specialty materials and manufacturing processes.

• Follow Infleqtions Product Lifecycle Process and support phased gate reviews design reviews configuration control build readiness environmental test readiness and executive updates.

• Develop and maintain mechanical risk-management and risk-resolution plans; support reliability analysis nonconformance resolution lessons learned and continuous improvement.

• Coach and mentor junior engineers in practical mechanical design drawing quality tolerance analysis build discipline and design-for-manufacturability/test.

• Other duties as assigned or required

Minimum Qualifications

• Bachelors degree required in mechanical engineering aerospace engineering or a closely related engineering discipline.

• 6 years of relevant and progressive experience in precision mechanical opto-mechanical aerospace or high-reliability hardware roles.

• Demonstrated expert-level proficiency in SolidWorks CAD design tools including parts assemblies drawings and configuration control.

• Excellent proficiency in first-principles mechanical engineering including load paths stiffness thermal expansion tolerancing materials and design trade studies.

• Experience using SolidWorks Simulation or comparable structural/thermal analysis tools; ability to interpret results and correlate analyses with hardware test.

• Excellent technical leadership and collaboration skills with the ability to drive decisions across mechanical optical electrical systems and manufacturing teams.

• Advanced understanding of opto-mechanics including free-space optical mounting collimation free-space and fiber-coupled alignment flexures and alignment/tolerance stability through build and environmental test.

• Demonstrated DFx experience: design for cost manufacturing assembly test reliability and serviceability.

• Understanding of ASTM E595 and practical material selection for vacuum and space environments including outgassing thermal expansion contamination corrosion and non-magnetic constraints.

• Experience designing custom flexure mounts precision optical/instrument mounts or passive isolation/damping features.

• Demonstrated tolerance analysis and tolerance-stack-up experience for precision assemblies.

• Hands-on engineer with experience building debugging and improving engineering-development and flight- or production-intent hardware.

• Uses AI appropriately for engineering leverage while understanding the limitations of current platforms and maintaining independent technical judgment and verification.

• Ability to travel domestically and (potentially) internationally up to 10%

Desired Qualifications

• Comfortable with a hands-on engineering-leadership approach including time in the lab supplier discussions integration and environmental test.

• Masters or PhD degree in aerospace mechanical engineering or related field.

• Experience delivering advanced technologies to commercial civil defense or space markets ideally through formal design review and environmental verification.

• Experience in hardware DFx (design for cost manufacturing assembly test sustainment) and supplier technical management.

• Familiarity with quantum sensing atomic physics precision optics/photonics vacuum systems or high-stability inertial/gravity instrumentation.

• Salary Range: per year 00
• 100% company-paid medical dental vision short/long-term disability
• Employer-funded Health Savings Account
• Unlimited PTO
• 401(k) match
• Company-paid Life and AD&D Insurance
• Flexible Savings Account
• Paid FMLA Maternity/Paternity Leave
• Employee Assistance Program
• Student Loan Repayment
• Equity Program

Notice to Recruitment Agencies:

Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.

Required Experience:

Staff IC