# Mechanical Engineer / Senior Mechanical Engineer, Opto-Mechanics at Xcimer Energy

- Company: Xcimer Energy
- What the company does: We're developing an excimer-based laser fusion architecture to commercialize safe, affordable fusion energy while advancing national security. We employ nearly 200 people, mostly in our Denver headquarters. Backed by Prelude Ventures.
- Company website: https://xcimer.energy
- Type: Startups
- Level: Senior
- Location: Denver, CO
- Work setup: On-site
- Pay: $106K to $183K base salary per year (USD)
- Posted: 2026-09-24
- Apply by: 2026-11-08
- Apply: https://jobs.lever.co/xcimer/bb8c7131-6ec7-43ea-94c6-176cafd245c9?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/xcimer-energy-mechanical-engineer-senior-mechanical-engineer-opto-mechanics/

## About the role

Xcimer Energy builds on decades of research in Inertial Fusion Energy (IFE), combined with a groundbreaking new laser architecture, to accelerate the deployment of fusion power plants. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a world-class team spanning tough tech, fusion science, and advanced manufacturing, with a proven track record of rapid execution. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- Design mirror mounts, window and lens mounts, opto-mechanical assemblies, optical benches, and structural supports for deep-UV, high-energy laser beam transport and diagnostics
- Develop requirements with optical, controls, and systems engineers, run trade studies and document design decisions
- Analyze designs with hand calculations and FEA (static, modal, thermal) to understand how mount stress, thermal gradients, gravity, and vibration affect optical surface figure and alignment
- Produce detailed models in NX, GD&T drawings per ASME Y14.5, and complete drawing packages, release and control them through engineering change
- Specify materials, finishes, and purchased components (stages, actuators, flexures, fasteners, vacuum hardware), work with machining and fabrication suppliers, and inspect and qualify hardware on receipt
- Build tolerance stack-ups and connect mechanical tolerances to optical sensitivity budgets

Tags: Design Integration

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/xcimer-energy-mechanical-engineer-senior-mechanical-engineer-opto-mechanics/