{"id":1297142,"url":"https://alion.io/job/bluecore-energy-principal-nuclear-mechanical-engineer","title":"Principal Nuclear Mechanical Engineer","company":{"id":3787835,"name":"Bluecore Energy","domain":"bluecore.energy","url":"https://alion.io/company/bluecore-2","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":null},"role":"Industrial Engineering","role_family":"Industrial Engineering","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":["Long Beach, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":200000,"max":220000,"currency":"USD","period":"year","gross":null,"usd_annual":220000},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ASME NQA-1","optional":false},{"name":"GD&T","optional":false},{"name":"Siemens NX","optional":false}],"status":"closed","first_seen_at":"2026-09-17T19:51:57Z","employer_posted_date":"2026-09-17","last_verified_at":"2026-10-22T05:25:20Z","board_verified":false,"closed_at":"2026-10-22T05:25:20Z","days_open":34,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":34},"description":"About the Role\nAs a Nuclear Mechanical Engineer, you'll own components for our primary system and reactor internals from concept through qualification. You'll turn thermal-hydraulic requirements into mechanical designs, size and specify hardware, and build the NX CAD models and drawings needed to fabricate it. You'll also prove your own designs out: planning and running test campaigns, gathering data, and qualifying components to the codes and quality standards nuclear hardware demands. You'll work directly with vendors capable of nuclear-grade fabrication, then feed what you learn from test and build back into the next design iteration. This is a hands-on role for a mid-level engineer ready to own components independently, equally comfortable at the CAD workstation, on the vendor floor, and at the test bench in a marine, radiological environment.\nResponsibilities\nOwn mechanical design of primary system and reactor internal components, from concept through detailed design.\n\nTranslate thermal-hydraulics analysis into component specifications, sizing, and design decisions.\n\nBuild and maintain NX CAD models and generate the drawings and specifications required for fabrication, including GD&T call-outs.\n\nPlan and run experimental test campaigns to qualify your own designs, including test plans, procedures, and data acquisition.\n\nQualify components to relevant nuclear codes and standards, such as the ASME Boiler and Pressure Vessel Code, Section III, and applicable quality requirements.\n\nEngage and manage vendors capable of nuclear-grade fabrication, from RFQ through receiving inspection.\n\nDesign with the marine and radiological environment in mind: vibration, shock, thermal cycling, corrosion, radiation exposure, and tight volumetric constraints aboard a vessel.\n\nDrive root-cause investigations when hardware doesn't perform as designed, and iterate the design accordingly.\n\nRequired Qualifications & Skills\nBachelor's degree in Mechanical Engineering, Nuclear Engineering, or a related field.\n\n3+ years of mechanical design experience, including components taken from concept through fabrication.\n\nHands-on experience with CAD and drawing generation, including GD&T.\n\nExperience planning and executing hardware test campaigns, from test plan through data acquisition and reporting.\n\nFamiliarity with nuclear codes and standards such as ASME Section III, or a demonstrated ability to quickly get up to speed on regulated hardware requirements.\n\nComfort working directly with vendors and fabricators to get nuclear-grade hardware built right.\n\nA pragmatic, curious, low-ego approach to problem-solving.\n\nDesired Qualifications & Skills\nDirect experience with ASME Section III, NQA-1, or other nuclear quality programs.\n\nExperience with FEA or first-principles hand calcs to inform design.\n\nFamiliarity with marine, nuclear, aerospace, or other regulated hardware environments.\n\nExperience shepherding a part from design → fab → test → iteration in a fast-moving environment.","description_format":"text","description_chars":3000,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Energy & Utilities","Nuclear Energy","Nuclear 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