{"id":4251831,"url":"https://alion.io/job/bwxt-mechanical-system-design-engineer","title":"Mechanical System Design Engineer","company":{"id":1757308,"name":"BWXT","domain":"bwxt.com","url":"https://alion.io/company/bwxt","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"SuccessFactors","truth_index":null},"role":"DevOps","role_family":"DevOps","seniority":"middle","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Lynchburg, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":86450,"max":null,"currency":"USD","period":"year","gross":null,"usd_annual":86450},"salary_estimate":null,"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Microsoft Office","optional":false},{"name":"AutoCAD","optional":true},{"name":"C++","optional":true},{"name":"Fortran","optional":true},{"name":"Python","optional":true},{"name":"SolidWorks","optional":true},{"name":"SysML","optional":true},{"name":"Visual Basic","optional":true}],"status":"live","first_seen_at":"2026-11-07T08:00:00Z","employer_posted_date":"2026-11-07","last_verified_at":"2026-11-13T14:11:17Z","board_verified":true,"closed_at":null,"days_open":6,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":6},"description":"At BWX Technologies, Inc. (NYSE: BWXT), we are People Strong, Innovation Driven. A U.S.-based company, BWXT is a Fortune 1000 and Defense News Top 100 manufacturing and engineering innovator that provides safe and effective nuclear solutions for global security, clean energy, environmental restoration, nuclear medicine and space exploration.With more than 7,800 employees, BWXT has 14 major operating sites in the U.S., Canada and the U.K. We are the sole manufacturer of naval nuclear reactors for U.S. submarines and aircraft carriers. Our company supplies precision manufactured components, services and fuel for the commercial nuclear power industry across four continents. Our joint ventures provide environmental restoration and operations management at a dozen U.S. Department of Energy and NASA facilities. BWXT’s technology is driving advances in medical radioisotope production in North America and microreactors for various defense and space applications. For more information, visit www.bwxt.com. Follow us on LinkedIn, X, Facebook and Instagram.\nWelcome to BWXT\nWe believe in empowering our employees and cultivating a dynamic workplace that fosters growth and collaboration. Whether you’re an experienced professional or just starting your career, you'll find opportunities to challenge yourself, learn from seasoned experts, and contribute to nuclear innovation. We required a diverse range of skills to support our work in the markets that drive our business and welcome candidates from all backgrounds and life stages who are passionate about making a difference.\nBWXT is People Strong, Innovation Driven - be part of BWXT’s innovation hub. BWXT’s Advanced Technologies (AT) group researches, designs, and develops innovative new nuclear reactors, nuclear rocket propulsion systems, and radioisotope production systems for both internal and external customers.\nIf you are looking for a career where your experience is valued, innovative thinking is fostered, and barrier-free teamwork is embraced every day, then this opportunity is for you.\nPosition Overview:\nBWXT Advanced Technologies is seeking a Mechanical System Design Engineer. This position is focused on system design, not detailed component design, and will report administratively to the Mechanical System Design Supervisor. The System Design Engineering group supports programs for internal and external customers across Advanced Manufacturing, Medical Radioisotopes, and Nuclear Reactor Design.\nLocation:\nThis position is based on-site in Lynchburg, VA at the Advanced Technologies Office.\nYour Day to Day as a Mechanical System Design Engineer:\nIdentify relevant system requirements and interface requirements then prepare appropriate system design documentation such as system design descriptions and control narratives.\nSelect components (e.g., valves, heat exchangers), perform calculations, and prepare specifications for their detailed design and procurement.\nDesign piping systems including line sizing and pressure drop calculations.\nLead the creation of appropriate output documentation such as process flow diagrams, P&IDs, component data sheets and system test request documentation.\nUtilize appropriate regulations, design codes and standards (e.g., ASME) for fluid systems.\nCoordinate with other interfacing disciplines such as systems engineers, electrical engineers, I&C engineers, mechanical equipment designers, and test engineers.\nPrepare and present system design results to internal and external stakeholders.\nRequired Qualifications:\nA bachelor’s degree in engineering (mechanical, nuclear, or similar discipline) or physics is required.\nA minimum of four (4) years of related work experience is required.\nMust possess a technical background in engineering design, fluid systems, thermodynamics, and process instrumentation.\nMust be proficient with standard Microsoft Office applications. \nMust have excellent written and verbal communication skills.\nMust possess the ability to self-direct with minimal day-to-day supervision.\nMust be a U.S. citizen.\nMust be able to obtain and maintain a U.S. Department of Energy (DOE) or Department of Defense (DOD) security clearance, whichever is required.\nPreferred Qualifications:\nExperience with the design and/or operation of thermo-mechanical fluid systems for nuclear applications.\nExperience with fluid system design and modeling software, such as AFT Arrow/Fathom, FlowMaster, Flownex, or comparable tools.\nExperience with CAD packages, such as SolidWorks or AutoCAD.\nProgramming experience with Python, C++, Fortran, Visual Basic, or similar.\nExperience with design verification including interface with component vendors and test engineering organizations.\nSystem modeling experience in Simulink and exposure to Sysml.\nFamiliarity with NRC and/or DOE requirements.\nKnowledge and experience in the application of Systems Engineering principles.\nWhat We Offer:\nCompetitive salary and benefits package, including health, dental, and retirement plans.\nFlexible work schedules and paid time off to promote a healthy work-life balance. \nProfessional development opportunities, including mentorship programs and sponsorship for continuing education.\nAn inclusive atmosphere that celebrates new perspectives and supports collaboration between different generations.\nThe chance to be part of a mission-driven organization making a positive impact on the future of energy. \nOpportunities for continuous learning and training to grow throughout your career! \nPay: $86,450.00 - $136,00.00\nThe base salary range for this position in Virginia (US-VA) at the start of employment is expected to be between $86,450.00 and $136,00.00 per year. However, the base salary offered is based on local job market factors, and may vary further depending on factors specific to the selected job candidate, such as job-related knowledge, skills, experience, and other objective business considerations. Subject to these considerations, the total compensation package for this position may also include other elements, such as an annual cash incentive in addition to a full range of medical, retirement, and/or other benefits. Details of participation in these benefit plans will be provided at such time the selected job candidate receives an offer of employment. If hired, the selected job candidate will be employed 'at-will,’ unless employed at a location and in a position subject to a collective bargaining agreement. The company further reserves the right to modify base salary (as well as any other discretionary payment, compensation or benefit program) at any time, including for reasons related to individual performance, company or individual department/team performance, and other market factors.\nAs a federal government contractor, BWX Technologies, Inc. and any subsidiaries, affiliates and related entities (“BWXT” or the “Company”) complies with all federal, state, and local laws and customer requirements regarding health and safety protocols. As such, all BWXT new hires will be required to adhere to applicable Company health and safety requirements within the workplace as a condition of employment.\nAll candidates must be U.S. citizens. Selected applicants are required to successfully complete a pre-employment check and drug screening. In addition, the position may require the ability to obtain and maintain applicable federal eligibility requirements for access to classified/sensitive information or matter which involves an extensive criminal and financial background investigation, drug test, previous employment, and reference verifications.\nBWXT is committed to the concept of Equal Employment Opportunity. We have established procedures to ensure that all personnel actions such as recruitment, compensation, career development, benefits, company-sponsored training and social recreational programs are administered without regard to race, color, religion, sex, national origin, citizenship, age, disability, protected veteran or other protected status.\nBWX Technologies, Inc. and its affiliates and subsidiaries (BWXT) is not responsible for and does not accept any liability for fees or other costs associated with resumes or candidates presented by recruiters or employment agencies, unless a binding, written recruitment agreement between BWXT and the recruiter or agency exists prior to the presentation of candidates or resumes to BWXT and includes the specific services, job openings, and fees to be paid (“Agreement”). BWXT may consider any candidate for whom a recruiter or agency has submitted an unsolicited resume and explicitly reserves the right to hire such candidate(s) without any financial obligation to the recruiter or agency unless an Agreement is in place prior to presentation and such Agreement explicitly encompasses the job opening for which such fees or costs are sought. An email, verbal or other informal contact with any person within BWXT will not create a binding agreement. Agencies or recruiters without an Agreement are directed not to contact any hiring managers of BWXT with recruiting inquiries or resumes. Recruiters and agencies interested in partnering with BWXT may contact BWXT’s Talent Acquisition team at .","description_format":"text","description_chars":9235,"description_truncated":false,"requirements":{"experience_years_min":4,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":true,"languages":[]},"benefits":["Continuous learning","Flexible schedule","Professional development","Retirement plans"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Energy & Utilities","Professional Services","Science & Engineering"],"lifecycle":[{"event":"open","at":"2026-11-13T14:07:34Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":6,"expected_fill_days":25,"reasons":["conf:1","win:early","comp:brand"],"computed_at":"2026-11-13T15:16:54Z"},"pay":{"stated_usd_annual":86450,"is_top_pay":false},"html_url":"https://alion.io/job/bwxt-mechanical-system-design-engineer","json_url":"https://alion.io/job/bwxt-mechanical-system-design-engineer.json","meta":{"generated_at":"2026-11-13T15:16:54Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":30696,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-14T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":1757308},"rest":"https://alion.io/mcp/rest/get_company?id=1757308"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fbwxt-mechanical-system-design-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"free","price":{"credits":0,"usd":0},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fbwxt-mechanical-system-design-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fbwxt-mechanical-system-design-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/bwxt-mechanical-system-design-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fbwxt-mechanical-system-design-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4251831}},{"tool":"search_jobs","arguments":{"company":"bwxt.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4251831},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}