{"id":3935883,"url":"https://alion.io/job/hii-principal-mechanical-engineer-engineer-mechanical-6-25317","title":"Principal Mechanical Engineer (Engineer Mechanical 6) - 25317","company":{"id":173905,"name":"HII","domain":"hii.com","url":"https://alion.io/company/hii","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"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":["Alexandria, Egypt"],"countries":["EG"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":160115,"max":240000,"currency":"USD","period":"year","gross":true,"usd_annual":240000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"GD&T","optional":false}],"status":"live","first_seen_at":"2026-10-11T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-10-11T00:00:00Z","board_verified":false,"closed_at":null,"days_open":33,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":33},"description":"Requisition Number:25317\nRequired Travel: 0 - 10%\nEmployment Type:Full Time/Salaried/Exempt\nAnticipated Salary Range:$160115.00-$240000.00\nSecurity Clearance:TS/SCI\nLevel of Experience:Senior\nThis opportunity resides with Warfare Systems (WS) a business group within HIIs Mission Technologies division. Warfare Systems comprises cyber and mission IT; electronic warfare; and C5ISR systems.\nHII works within our nations intelligence and cyber operations communities to defend our interests in cyberspace and anticipate emerging threats. Our capabilities in cybersecurity network architecture reverse engineering software and hardware development uniquely enable us to support sensitive missions for the U.S. military and federal agency partners.\n\nMeet HIIs Mission Technologies Division\nOur team of more than 7000 professionals worldwide delivers all-domain expertise and advanced technologies in service of mission partners across the globe. Mission Technologies is leading the next evolution of national defense the data evolution - by accelerating a breadth of national security solutions for government and commercial customers. Our capabilities range from C5ISR AI and Big Data cyber operations and synthetic training environments to fleet sustainment environmental remediation and the largest family of unmanned underwater vehicles in every class. Find the role thats right for you. Apply today. We look forward to meeting you.\nTo learn more about Mission Technologies click here for a short video: Description \nAre you a technical powerhouse ready to lead the charge on next-generation defense and security solutions Do you thrive on solving complex multi-disciplinary problems that have a direct impact on national security\nMission Technologies a division of HII is seeking a Principal Mechanical Engineer to join our team of innovators in Alexandria VA. Were looking for a seasoned expert with creative mind diverse fabrication skillsets and expertise based on a deep understanding of customer mission priorities.\nAs a Principal Mechanical Engineer you will serve as a chief technical expert for a broad range of mission critical projects. Youll be a go-to expert for multifaceted engineering challenges from concept development and system architecture to detailed design analysis and testing. This is a hands-on impactful role where youll guide and mentor talented junior engineers while providing the strategic vision for your projects. You wont just be an engineer; youll be an architect of solutions that enable strategic missions.\nEssential Job Responsibilities Researches plans designs verifies validates and develops mechanical and/or electromechanical products and systems such as metals instruments controls plastics robots engines machines and mechanical resonance hydraulic or heat transfer systems for production transmission measurement and use of energy. Recommends various technology options or approaches for system processes facility or program improvements in terms of safety performance efficiency or costs. May be responsible for the transfer from R and D to manufacturing.\nLead the design and development of complex mechanical systems and subsystems for defense and security applications.\n\nServe as the primary technical lead for multiple projects ensuring all designs meet rigorous performance safety and reliability standards.\n\nConduct advanced thermal structural and kinematic analysis to validate product requirements.\nMentor and provide technical guidance to junior mechanical engineers fostering a culture of innovation and excellence.\n\nCollaborate with cross-functional teams including electrical engineers software developers and program managers to integrate complex systems.\n\nDrive the entire product lifecycle from initial concept and prototyping to manufacturing and field support.\nContribute to business development activities by providing technical expertise for proposals and new program initiatives.\n\nMinimum Qualifications 20 years relevant experience with Bachelors in related field; 18 years relevant experience with Masters in related field; or 15 years relevant experience with PhD or Juris Doctorate in related field.\nProven experience as a technical lead on complex multi-disciplinary projects.\n\nExpertise in CAD software and FEA/CFD analysis tools.\n\nStrong knowledge of materials science manufacturing processes and GD&T (Geometric Dimensioning and Tolerancing).\n\nExisting network professional engineers and client representatives within or adjacent to HII-Mission Technologies Intelligence Community customer base\nAn active TS/SCI clearance with Poly\nPhysical Requirements Exposure to fumes and irritants normally encountered in an industrial environment. May involve gathering data while observing rotating or operating machinery electrical or electronic equipment with high voltages present.\nThe listed salary range for this role is intended as a good faith estimate based on the roles location expectations and responsibilities. When extending an offer HIIs Mission Technologies division takes a variety of factors into consideration which include but are not limited to the roles function and a candidates education or training work experience and key skills.\nTogether we are working to ensure a future where everyone can be free and thrive.\nAll qualified applicants will receive consideration for employment without regard to race color religion gender gender identity or expression sexual orientation national origin physical or mental disability age or veteran status or any other basis protected by federal state or local law.\nDo You Need Assistance\nIf you need a reasonable accommodation for any part of the employment process please send an e-mail to and let us know the nature of your request and your contact information. Reasonable accommodations are considered on a case-by-case basis. Please note that only those inquiries concerning a request for reasonable accommodation will be responded to from this email address. Additionally you may also call 1- for assistance. Press #3 for HII Mission Technologies.\n\nRequired Experience:\nStaff IC","description_format":"text","description_chars":6107,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":true,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Naval Systems","Defense Manufacturing"],"lifecycle":[{"event":"open","at":"2026-11-08T07:34:30Z"}],"visa":[],"liveness":{"score":29,"band":"fade","label":"Fading","p_open":0.6,"p_active":0.866,"p_room":0.55,"age_days":32,"expected_fill_days":27,"reasons":["seen:32","urgency","velocity","win:tail"],"computed_at":"2026-11-12T10:38:37Z"},"pay":{"stated_usd_annual":240000,"is_top_pay":true},"html_url":"https://alion.io/job/hii-principal-mechanical-engineer-engineer-mechanical-6-25317","json_url":"https://alion.io/job/hii-principal-mechanical-engineer-engineer-mechanical-6-25317.json","meta":{"generated_at":"2026-11-13T17:45:56Z","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":35495,"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":173905},"rest":"https://alion.io/mcp/rest/get_company?id=173905"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fhii-principal-mechanical-engineer-engineer-mechanical-6-25317"},{"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%2Fhii-principal-mechanical-engineer-engineer-mechanical-6-25317"},{"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%2Fhii-principal-mechanical-engineer-engineer-mechanical-6-25317"},{"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/hii-principal-mechanical-engineer-engineer-mechanical-6-25317\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fhii-principal-mechanical-engineer-engineer-mechanical-6-25317"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3935883}},{"tool":"search_jobs","arguments":{"company":"hii.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3935883},"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. 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