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Salary
$140k – $165k per year
Location
In office (Denver)
Seniority
Senior · 10+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 27, 2026. First seen by Alion on Oct 15, 2026. Xcimer Energy scores A on the Alion truth index.

Overview
Company
Impact
Profile match
Xcimer Energy is a Denver-based company developing laser-driven inertial fusion power and high-energy laser systems for air defense, built around large electron-beam-pumped excimer lasers. In 2024 it began building Phoenix, its first high-energy laser system, in its Denver laser bay, it has had a fusion power plant preconceptual design milestone approved by the US Department of Energy, and RTX has invested in it to develop directed energy technology. It hires optical, laser, pulsed power and nuclear engineers, physicists and materials scientists, scientific software and data engineers, technicians, quality and supply chain leaders, and summer interns.

Xcimer Energy leverages decades of research on Inertial Fusion Energy (IFE) combined with groundbreaking new laser architecture. Our mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. Xcimer has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by leading investors, Xcimer is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. Join us in powering a better world with inertial fusion!

This is a full-time, onsite role based at our headquarters in Denver, CO.

As a Systems Engineer IV, you will be a thought leader in Xcimer influencing and educating technical leads to capture, organize, and track the integrated technical baseline for our IFE Program. The successful candidate will perform leading and supporting roles in establishing and maintaining bidirectional traceability across our requirements, architecture, documentation, and analysis products. The candidate will define and maintain infrastructure, define relationships between internal and external interfaces, and communicate system-level use cases and relationships to a diverse group of stakeholders. The candidate will work with team leads across the organization to craft the key framework and documents needed to define, design, build, test, and activate our facilities and systems. We are looking for engineers to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!

Responsibilities

  • Provide technical guidance and oversight to ensure the successful development and implementation of system functionality
  • Implement the processes, traceability, and documentation necessary to support IFE program
  • Collaborate with program teams, including new development and legacy systems, to identify opportunities for integration and support the development of updated releases
  • Carry out systems engineering activities in accordance with tailored system engineering standards and practices
  • Drive and coordinate technical decision making
  • Conduct risk assessments to ensure risk mitigation plans are developed and implemented
  • Act as the negotiator between multiple teams to make sure the holistic system is optimized
  • Develop strategies, approaches for specialty engineering (operability, reliability, maintainability, supportability) integration, analysis and verification

Qualifications

  • Education: Minimum of a B.S. degree in engineering or other technical field (e.g. mechanical, electrical, chemical, etc.)
  • Experience: 10+ years of Systems Engineering/Software Engineering experience
  • Proven experience leading cross-functional teams and collaborating with stakeholders to drive technical innovation and growth
  • Proven experience owning the integrated technical baseline for complex systems through the full Systems Engineering Lifecycle
  • Experience working on development programs for large, complex, integrated systems or facilities - preferably from the fusion/energy, nuclear, aerospace, or space and defense industry
  • Strong technical experience in simulation, software, and data analysis, with an understanding of industry trends and emerging technologies
  • Fluent with Atlassian suite tools (Confluence, Jira)
  • Experience with rapid technology development, integration, and testing
  • Great communication skills, ability to work effectively in teams, demonstrated execution and coordination skills
  • Project management skills including labor estimating and schedule management
  • Demonstrated configuration management experience
  • Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee of granted asylum.

Desired

  • Experience with defining, designing, and activating large facilities for assembly, integration, and testing for large complex systems
  • Experience with high energy laser systems, optics, or nuclear energy systems
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