Lead Opto-Mechanical Engineer for Fusion Diagnostics

Commonwealth Fusion Systems; Harvard (MA); On-site; USD 130,000 - 180,000; Full time

Job summary

Commonwealth Fusion Systems is seeking a Senior Opto-mechanical Engineer to lead the design of SPARC diagnostics from concept through build and commissioning. You will package optical and waveguide assemblies, develop alignment systems, and mentor engineers in a fast-paced, high-field, vacuum environment.

You will collaborate with scientists and CAD designers, perform tolerance analyses, and ensure manufacturability for complex tokamak diagnostics.

Qualifications

• Bachelor’s degree in mechanical, optical engineering, engineering physics, or related field.
• 8+ years of experience in opto-mechanical or precision mechanical design.
• Led the opto-mechanical design of precision optical instruments or systems from concept through build, test, and deployment.
• Designed optical mounts and packaging, including kinematic and semi-kinematic mounts, flexures, optic bonding, and athermal design.
• Designed and implemented alignment mechanisms and alignment procedures for multi-element optical systems.
• Perfromed tolerance analysis and used structural/thermal FEA to predict optical performance.

Responsibilities

• Lead the opto-mechanical design and close-out of remaining SPARC long wavelength diagnostic sub-systems, carrying designs through final design review, release, procurement, and build.
• Design mounts, enclosures, and packaging for optical and waveguide assemblies along beamlines from the tokamak to the Diagnostic Labs.
• Develop and implement active and passive alignment systems to maintain alignment over long paths and through disturbances.
• Perform/lead tolerance analysis and error budgets; run or direct FEA analyses and feed results back into designs.
• Collaborate with diagnosticians, scientists, and engineers to translate requirements into manufacturable designs and coordinate interfaces with the tokamak and building teams.
• Produce models and drawings (GD&T); coordinate with vendors and machine shops on build and lead-time tradeoffs.
• Plan and provide hands-on support for assembly, installation, alignment, calibration, and commissioning.
• Provide technical leadership and mentorship; review work and contribute to opto-mechanical standards and best practices.
• Contribute to safety culture, including laser, vacuum, and high magnetic field safety; assist commissioning and operation of SPARC diagnostics.

Skills

Opto-mechanical design

Precision mechanical design

Technical leadership

Cross-functional collaboration

Education

Bachelor's degree in mechanical engineering

Tools

3D CAD

GD&T (ASME Y14.5)

Zemax OpticStudio

Siemens NX

Teamcenter

Python

MATLAB

Job description

Commonwealth Fusion Systems is seeking a Senior Opto-mechanical Engineer to lead the design of SPARC diagnostics from concept through build and commissioning. You will package optical and waveguide assemblies, develop alignment systems, and mentor engineers in a fast-paced, high-field, vacuum environment.

You will collaborate with scientists and CAD designers, perform tolerance analyses, and ensure manufacturability for complex tokamak diagnostics.