We are seeking a Sr. Advanced Mechanical Design Engineer in our Broomfield, CO, Location.

All applicants for placement in safety-sensitive positions will be required to submit to a pre-employment drug test.

• Design and develop cryogenic systems, including refrigeration and liquefaction systems, cryostats, and cryogenic storage solutions
• Apply principles of thermodynamics, heat transfer, and fluid dynamics to optimize cryogenic processes
• Work within a fast-paced environment to turn concepts into prototype designs & iterate on these designs based on lab test results
• Conduct research to develop new cryogenic technologies and improve existing systems
• Apply mechanical design tools such as Onshape and Ansys to rapidly design and deliver cryogenic systems that meet the evolving needs of customers, ranging from prototypes to commercial products
• Utilize Onshape and Arena PLM software tools to manage design releases and product documentation
• Perform thermal modeling and analysis and use results to inform design decisions
• Work hands-on to build and validate your prototypes and deliver commercial systems
• Work with manufacturing to ensure solutions are producible and scalable
• Perform simulations and experiments to test cryogenic equipment and systems
• Analyze data and ensure systems meet performance and safety standards
• Prepare technical documentation, including design specifications, operating manuals, and maintenance guidelines
• Present findings and project updates to stakeholders and management
• Liaise with suppliers, manufacturers, and external contractors as needed
• Ability to travel up to 15%

• Bachelor’s degree minimum required
• Minimum 7+ years of mechanical or cryogenic system design experience required
• Minimum 1+ years of experience performing thermal modeling and analysis required
• Due to Contractual requirements, must be a U.S. Person defined as, U.S. citizen permanent resident or green card holder, workers granted asylum or refugee status.
• Due to national security requirements imposed by the U.S. Government, candidates for this position must not be a People's Republic of China national or Russian national unless the candidate is also a U.S. citizen.

• Master's degree, PhD, or higher in Engineering, Physics or a related field preferred.
• Strong understanding of engineering principles, thermodynamics, and heat transfer with practical experience applying this knowledge to real-world engineering challenges
• Experience designing, building and operating cryogenic, vacuum and electro-mechanical systems
• Experience with thermal and vibrational modeling and using this analysis to inform design decisions
• Experience working hands on to build and validate your prototypes and system designs
• Experience with mechanical inspection and working with suppliers on complex mechanical procurement and subcontracts
• Experience with PLM/PDM to manage design releases and engineering change orders ensuring documentation compliance throughout the product development lifecycle
• Proficiency in controls software for controls systems and/or CAD software for system design and modeling
• Knowledge of safety protocols and regulations pertaining to cryogenic materials
• Excellent problem-solving skills and ability to troubleshoot complex systems

Compensation & Benefits:

The pay range for this role is $136,000 – $170,000 annually. Actual compensation within this range may vary based on the candidate’s skills, educational background, professional experience, and unique qualifications for the role.

Quantinuum is the world leader in quantum computing. The company’s quantum systems deliver the highest performance across all industry benchmarks. Quantinuum’s over 650 employees, including 400+ scientists and engineers, across the US, UK, Germany, and Japan, are driving the quantum computing revolution.

By uniting best-in-class software with high-fidelity hardware, our integrated full-stack approach is accelerating the path to practical quantum computing and scaling its impact across multiple industries.

By joining Quantinuum, you’ll be at the forefront of this transformative revolution, shaping the future of quantum computing, pushing the limits of technology, and making the impossible possible.

A competitive salary and innovative, game-changing work

Flexible work schedule

Employer subsidized health, dental, and vision insurance

401(k) match for student loan repayment benefit

Equity, 401k retirement savings plan + 12 Paid holidays and generous vacation + sick time

Paid parental leave

Employee discounts

Quantinuum is an equal opportunity employer. You will be considered without regard to age, race, creed, color, national origin, ancestry, marital status, affectional or sexual orientation, gender identity or expression, disability, nationality, sex, or veteran status. Know Your Rights: Workplace discrimination is illegal

Applications will be accepted on an ongoing basis, there is no application deadline for this position.