{"id":3554957,"url":"https://alion.io/job/relativity-space-construction-mechanical-engineer-ii","title":"Construction Mechanical Engineer II","company":{"id":5617,"name":"Relativity Space","domain":"relativityspace.com","url":"https://alion.io/company/relativity-space","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":73,"open_postings":68,"ghost_share":0,"stale_share":0.882,"repost_share":0,"time_to_fill_p50_days":61,"computed_at":"2026-11-04T06:34:25Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","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":["Long Beach, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":104000,"max":156000,"currency":"USD","period":"year","gross":null,"usd_annual":156000},"salary_estimate":null,"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AutoCAD","optional":false}],"status":"live","first_seen_at":"2026-10-30T21:30:06Z","employer_posted_date":"2026-10-30","last_verified_at":"2026-11-04T18:24:23Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"At Relativity Space, we’re building rockets to serve today’s needs and tomorrow’s breakthroughs. Our Terran R vehicle will deliver customer payloads to orbit, meeting the growing demand for launch capacity. But that’s just the start. Achieving commercial success with Terran R will unlock new opportunities to advance science, exploration, and innovation, pioneering progress that reaches beyond the known.\nJoining Relativity means becoming part of something where autonomy, ownership, and impact exist at every level. Here, you're not just executing tasks; you're solving problems that haven’t been solved before, helping develop a rocket, a factory, and a business from the ground up. Whether you’re in propulsion, manufacturing, software, avionics, or a corporate function, you’ll collaborate across teams, shape decisions, and see your work come to life in record time. Relativity is a place where creativity and technical rigor go hand in hand, and your voice will help define the stories we’re writing together. Now is a unique moment in time where it’s early enough to leave your mark on the product, the process, and the culture, but far enough along that Terran R is tangible and picking up momentum. The most meaningful work of your career is waiting. Join us.\nAbout the Team: \nThe Construction Design and Delivery team is at the core of Relativity's growth and development. Through our collaboration and expertise, we deliver projects that lay the foundation for Relativity's future success. In essence, we build the factory that builds the rockets! We are responsible for cross functional relationships with reams such as Manufacturing, Propulsion, PBF, Avionics, Machine Shop, Facilities, EHS, and Security to name a few, working through design specification and execution of critical infrastructure projects that supports the mission of work centers. Our relationships don't stop there, working daily with government agencies, utility suppliers, vendors and contractors who support our factory build out. Our team ensures that all projects meet operational requirements, safety and environmental codes, all the while remaining within budget, delivering on time, and to the highest quality as we help to drive production forward. \nAbout the Role: \nSupport the design and development of mechanical systems, including HVAC, plumbing, process gas distribution, and specialized systems such as cryogenic, high-pressure, and oxygen monitoring systems.\nPerform engineering calculations, equipment sizing, load analyses, and system performance evaluations to support efficient, reliable, and code-compliant mechanical designs.\nDevelop and maintain mechanical design documentation, including AutoCAD drawings, Revit models, Basis of Design narratives, technical specifications, and as-built drawings.\nCollaborate with cross-functional engineering, construction, manufacturing, and facilities teams to ensure mechanical systems are properly coordinated, constructible, and aligned with operational requirements.\nSupport mechanical and plumbing projects from initial concept and design through construction, commissioning, and final handoff, including scheduling, budgeting, risk assessment, and documentation.\nReview designs, drawings, and submittals from external consultants and vendors to ensure compliance with applicable codes, industry standards, project specifications, and safety requirements.\nConduct site inspections, troubleshoot technical issues, respond to RFIs, and coordinate with contractors and internal stakeholders to resolve field challenges and maintain project timelines.\nSupport system startup, testing, commissioning, and continuous improvement initiatives to enhance the efficiency, reliability, and maintainability of manufacturing and office facilities.\nAbout You:\nBachelor of Science degree in Mechanical Engineering or a related engineering field.\nMinimum 2+ years of experience in mechanical design and engineering for infrastructure, manufacturing, or commercial building systems.\nExperience in the design and specification of HVAC, hydronic/chilled water, plumbing, drainage, compressed air, and exhaust systems.\nExperience developing Basis of Design (BOD) documentation, mechanical load calculations, and equipment sizing.\nFamiliarity with mechanical codes and standards, including ASHRAE, Title 24, NFPA, and Uniform Plumbing Code (UPC).\nExperience in creating and reviewing permit-ready mechanical drawings and specifications.\nNice to have but not Required:\nMaster’s degree in Mechanical Engineering or related field.\nEngineer In Training (EIT) Certification.\nLEED GA or LEED AP accreditation.\nBackground in supporting cleanroom ventilation, specialty gas systems, or critical environment design.\nAt Relativity Space, we are committed to transparency and fairness in our compensation practices. Actual compensation will be determined based on experience, qualifications, and other job-related factors.\nCompensation is only one part of our total rewards package. Relativity Space offers competitive salary and equity, a generous PTO and sick leave policy, parental leave, an annual learning and development stipend, and more! To see some of the benefits & perks we offer, please visit here.\nHiring Range:\n$104,000—$156,000 USD\nWe are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.\nIf you need a reasonable accommodation, please contact us at .\n Please note: Relativity Space does not accept unsolicited resumes, candidate profiles, or referrals from recruitment agencies or search firms. 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