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Salary
$54k – $72k per year
Location
In office (Broomfield)
Seniority
Intern
Visa
No sponsorship (stated in the posting)
Employment
Internship

Confirmed on the employer's own hiring board on Nov 9, 2026. First seen by Alion on Sep 17, 2026. Quantinuum scores B on the Alion truth index.

Overview
Company
Impact
Profile match
Quantinuum is a quantum computing company headquartered in Broomfield, Colorado, formed in 2021 by combining Honeywell Quantum Solutions with Cambridge Quantum. It builds trapped-ion quantum computers such as its H-series systems and develops software including a quantum chemistry platform and compiler tools. Honeywell is its majority owner, and it has major sites in Broomfield, Minnesota, Cambridge and London in the UK, and offices in Japan and Singapore. It hires manufacturing and semiconductor packaging engineers, compiler and software engineers, physicists and finance staff.

We are seeking a Mechanical Engineering Intern for Photonics Physics Package R&D in our Broomfield, CO location to support trapped-ion integrated photonics R&D team.

Our diverse team of engineers and scientists develops optics and integrated photonics technologies that enable scaling of our trapped-ion quantum computers from our current 98-qubit Helios system to our future Lumos system with hundreds of thousands of qubits. The data, designs, and expertise from our group inform our next-generation systems, from the overall architecture to the tiniest of details. We are looking for more collaborative engineers and scientists to join our cross-disciplinary team.

Key Responsibilities:

  • Support the trapped-ion integrated photonics R&D effort through one or more of the following:
  • Support the design, build, integration, and/or operation of cryogenic ultra-high vacuum (UHV) test systems used to evaluate and scale next-generation quantum computing technologies.
  • Create and maintain 3D CAD models, detailed engineering drawings, and assembly documentation for custom mechanical components, fixtures, and test hardware.
  • Collaborate with engineers and scientists to fabricate, assemble, troubleshoot, and improve experimental ion trap test systems.
  • Collect and analyze data to validate hardware performance, reliability, and manufacturability.
  • Support root cause investigations and failure analysis activities to identify design improvements and enhance system performance.
  • Contribute to design reviews, engineering documentation, and configuration management processes.
  • Work closely with the Integrated Photonics team to design and build fixtures, tooling, and test hardware supporting photonic device characterization and validation.

You Must Have:

  • Actively pursuing a bachelor’s degree in mechanical engineering or related degree
  • Graduating after December 2027
  • Due to Contractual requirements, applicants for employment for this position must have work authorization that does not now or in the future require sponsorship of a visa for employment authorization in the United States and with Quantinuum. (i.e., H1-B visa, F-1 visa (OPT), TN visa or any other non-immigrant 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.

WE VALUE:

  • Curiosity towards vacuum systems, cryogenics, precision mechanics, optics, photonics, or scientific instrumentation and their connection to quantum computing
  • Strong problem-solving skills with a willingness to troubleshoot complex multidisciplinary systems.
  • Ability to communicate technical concepts clearly and work effectively in multi-disciplinary teams.
  • Experience with CAD software such as SolidWorks or Onshape.
  • Hands-on experience designing, fabricating, or assembling mechanical systems in a laboratory, research, academic, or industry setting.
  • Familiarity with engineering drawings, GD&T, tolerance stack-up analysis, and design for manufacturing principles.
  • Experience operating rapid prototyping tools or working with machine shops and vendors.
  • Familiarity with structural, thermal, vibration, or finite element analysis methods.
  • Programming or scripting experience (Python, MATLAB, LabVIEW, or similar) for automation, analysis, or test equipment control.
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