Senior Mechanical Design Engineer
Inertia
Posted: March 13, 2026
Interested in this position?
Create a free account to apply with AI-powered matching
Quick Summary
Design and develop ultra-high energy pulsed laser systems for fusion energy, working closely with cross-functional teams
Required Skills
Job Description
Overview:
We are seeking a Senior Mechanical Design Engineer within the laser division, to play a key role in developing the next generation of ultra-high energy pulsed laser systems for fusion energy. Typical design projects would include the design and development of solid-state laser hardware and systems, large-aperture opto-mechanical mounts and positioning systems, support structures, vacuum chambers and systems, thermal management systems, and test stands and diagnostics.
Primary Responsibilities:
• Gather and develop requirements for systems with stakeholders across all disciplines
• Conceptualize system architectures and concepts based on high-level requirements
• Lead small teams in the design of precision mechanical and opto-mechanical equipment and systems for IFE facilities
• Design mechanical, opto-mechanical, and electro-mechanical equipment and systems
• Validate design work with appropriate analysis (static and modal FEA, hand calculations, etc.)
• Present at design reviews to science and management stakeholders
• Work closely with other disciplines in the design and coordination of activities
• Integrate precision opto-mechanical, fluidic, and electrical hardware, designed both in-house and by subcontractors, into large-scale CAD assemblies that include facility BIM data
• Perform detailed component materials and finish specifications, manage technical data transfer to suppliers, inspect and qualify hardware following procurement
• Assemble prototype hardware; develop and execute test plans for subsystem performance validation
• Utilize large-scale CAD assemblies to provide assembly documentation and installation schedules for opto-mechanical and electrical systems
• Guide and mentor other engineers
Required Qualifications:
• 10+ years of experience as a mechanical design engineer
• Proven history of delivering novel and innovative solutions to challenging problems
• Proficiency with 3D CAD packages; SolidWorks (preferred), CREO, Autodesk Inventor, etc.
• Thorough knowledge of drafting, tolerance analysis, and Geometric Dimensioning and Tolerancing (GD&T)
• Demonstrated experience with FEA - Structural, Modal, Random Vibration with empirical validation
• Experience with CFD analysis with empirical validation (preferred)
• Practical knowledge of manufacturing processes (machining, sheet metal, welding) and design for manufacturability (DFM)
• Experience specifying components for precision design: linear stages, rotary motors, encoders, optical sensors, pneumatic components, vacuum components, etc.
• Full design lifecycle experience including design, procurement, assembly, and test of mechanical systems
• Experience with cleanroom procedures, high-voltage, and high-vacuum environments
• Experience designing laser systems or optical instruments
• Experience with Product Data Management Systems; SolidWorks PDM (preferred)
• Applicants should be able to work both autonomously as well as collaboratively to execute tasks in support of various teams within the company
• Due to the nature of this position, applicants must be U.S. citizens or permanent residents.
Salary & Benefits:
• The base salary range for this role is $150,000 - $180,000 per year; The pay range provided is an estimated base range for this role. Exact compensation may vary based on skills, experience, and education.
• We offer market-competitive compensation and an excellent benefits program, including Medical, Dental, and Vision plans, company-paid holidays, matching 401k, and more!
About Inertia:
Inertia is taking the most direct, scientifically-proven path to commercializing fusion, leveraging the only successful achievement of fusion ignition, using a process that was pioneered at the U.S. Department of Energy’s (DOE) Lawrence Livermore National Laboratory (LLNL). With groundbreaking innovation, transformative technology, and multi-year investment, Inertia is committed to commercializing fusion energy in the next decade.