{"id":702383,"url":"https://alion.io/job/xcimer-lead-experimental-physicist","title":"Lead Experimental Physicist","company":{"id":685639,"name":"Xcimer Energy","domain":"xcimer.energy","url":"https://alion.io/company/xcimer","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"A","score":94,"open_postings":19,"ghost_share":0,"stale_share":0.053,"repost_share":0,"time_to_fill_p50_days":125,"computed_at":"2026-10-10T05:45:15Z"}},"role":"Science & Research","role_family":"Science & Research","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Denver, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":200000,"max":225000,"currency":"USD","period":"year","gross":null,"usd_annual":225000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"MATLAB","optional":false},{"name":"Python","optional":false}],"status":"live","first_seen_at":"2026-04-14T19:34:21Z","employer_posted_date":"2026-04-14","last_verified_at":"2026-10-11T23:24:54Z","board_verified":true,"closed_at":null,"days_open":180,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":179},"description":"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!\nThis is a full-time, onsite role based at our headquarters in Denver, CO.\nAs the Lead Experimental Physicist, you will be responsible for independently driving complex laser-based experiments from definition through execution and analysis. This role requires strong experimental physics judgment, deep interest in the underlying science, and the ability to quickly learn and master sophisticated systems. You will design experiments, develop/upgrade diagnostics, analyze and interpret data, and continuously identify opportunities to improve experimental performance. You will work closely with scientists, engineers, technicians, shot directors, and leadership, serving as the technical driver for assigned experimental programs. We are looking for our scientists and engineers to apply their technical expertise, problem solving skills, and dedication to quality to positively impact the future of energy!\nResponsibilities\nAct as the primary experimental owner for assigned laser experiments\nRapidly learn and develop deep understanding of complex experimental platforms, including lasers, diagnostics, and supporting subsystems\nDesign and execute experiments involving lasers, spectroscopy, imaging, and time resolved measurements\nDevelop and apply appropriate diagnostics to understand system performance and debug experimental issues\nTranslate high level scientific objectives into detailed experimental designs and test plans\nReview experimental results critically, identify limitations, and drive systematic improvements\nPerform quantitative post processing and analysis of spectroscopy and imaging data\nModify, extend, and maintain data processing and analysis scripts\nProduce clear technical reports, presentations, and publishable quality results\nInterface with the scientific board and senior scientists to understand experimental priorities and required outcomes\nCollaborate closely with technicians and engineers, providing technical direction, mentoring, and training\nTroubleshoot nontrivial experimental, diagnostic, and system level issues\nWork effectively across disciplines, including experimentalists, theorists, engineers, and technicians\nQualifications\n Education: PhD in Physics, Electrical Engineering, Applied Physics, or a closely related field, or equivalent experience\nStrong hands-on experience with laser-based experiments\nSolid understanding of optical and laser diagnostics\nDemonstrated ability to independently drive complex experimental work\nExperience debugging complex experimental systems and diagnosing root causes\nWillingness to learn pulsed power concepts\nProficiency in data analysis and post processing\nStrong written and verbal communication skills\nHigh level of motivation, curiosity, and ownership mindset\nMust 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\nDesired\nFamiliarity with excimer lasers\nExperience in laser gain dynamics\nExperience with laser wavefront measurement\nExperience with deformable mirrors\nExperience with phase plates\nExperience with gas kinetics\nExperience with vacuum systems.\nExperience operating and aligning pulsed laser systems\nExperience producing scientific publications\nExperience working in multidisciplinary research laser facilities, such as national labs\nExperience with Matlab, Python, and LabVIEW.\nPrior experience mentoring technicians or junior team 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