{"id":1933012,"url":"https://alion.io/job/hed-mechanical-engineer-mission-critical-2","title":"Mechanical Engineer - Mission Critical","company":{"id":1967944,"name":"HED","domain":"hed.co","url":"https://alion.io/company/hed-co","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"ADP","truth_index":{"grade":"A","score":92,"open_postings":19,"ghost_share":0,"stale_share":0.105,"repost_share":0,"time_to_fill_p50_days":94,"computed_at":"2026-10-25T05:49:26Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"staff","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Los Angeles, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":130000,"max":165000,"currency":"USD","period":"year","gross":null,"usd_annual":165000},"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[],"status":"live","first_seen_at":"2026-10-05T20:34:00Z","employer_posted_date":"2026-10-05","last_verified_at":"2026-10-25T05:27:53Z","board_verified":true,"closed_at":null,"days_open":19,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":19},"description":"Mechanical Engineer - Mission Critical\nOur Mechanical Engineering team is looking to add an experienced team member to our group of talented engineers. The Mechanical Engineer is a technical expert and design leader responsible for shaping high-performance, integrated mechanical engineering solutions across major and complex projects.\nAbout HED\nWe are a team that is full of ideas, experience, creativity, passionate opinions, insatiable curiosity, uncompromising integrity, commitment, and skill. Our culture is about aspiration, embracing change and challenges, listening to (and learning from) each other, encouraging continual learning, and inspiring collective growth. As an inclusive, integrated architecture and engineering practice, we value the diversity of perspectives, experiences, abilities, and expertise that advance both the work we do, and the world we share.\nPosition Summary\nThis role sets the standard for technical execution, QAQC rigor, and interdisciplinary coordination across the firm. Mechanical Engineers at this level operate with full autonomy, own major portions of mechanical project design delivery, and mentor cross-functional teams. As trusted advisors, they represent the firm in client relationships, ensure technical excellence, and guide engineering strategy at the highest level. Their work influences practice-wide standards, design innovation, and technical mentorship.\nEssential Functions:\nLead the design and documentation of complex mechanical systems-such HVAC, plumbing and/or fire protection systems - - with minimal oversight.\nValidate and approve key mechanical engineering calculations -such as refrigerant concentration limit calculations, plumbing system sizing, and equipment sizing - and integrate results into system design.\nOversee setup of mechanical Revit models, including views, sheet organization, system browser strategies, and annotation standards.\nResolve system conflicts during interdisciplinary coordination by collaborating with architectural, structural, and civil teams.\nServe as the primary mechanical technical contact across internal and external project teams.\nReview and approve mechanical submittals, RFIs and substitutions; coordinate detailed responses with the broader team.\nPerform site visits, field verification, and punch walks with high autonomy; generate professional-level mechanical field reports.\nProvide mechanical design leadership from early concept through construction administration; inform system selection, performance targets, and documentation strategy.\nGuide QAQC reviews for mechanical deliverables and assist in the development of project-specific mechanical quality plans.\nMentor junior engineers and mechanical designers through delegation, technical feedback, and one-on-one coaching.\nParticipate in fee development, scoping, and resource planning for mechanical scope in project proposals.\nLead internal and external project meetings by presenting mechanical system concepts, decisions, and trade-offs.\nMission Critical Specific Functions:\nHave a strong understanding of mission critical HVAC systems, including but not limited to Fan Coil Walls, MDR/MMR CRAHs, air and water cooled chiller systems, and liquid cooling systems.\nAbility to review and interpret CFD reports to understand impacts to equipment performance and use to inform design decisions.\nAbility to estimate loads for equipment sizing and work with team members to oversee detailed load calculations.\nKnowledge of IEEC, ASHRAE 90.1 & 90.4 requirements for equipment/system efficiency requirements.\nKnowledge of typical redundancy requirements for data centers and impact on design requirements for specific tier.\nKnowledge of master planning for high level client interaction and support for site planning of future buildings and estimate utility impacts.\nRequirements\nBachelor's degree in Mechanical Engineering, or equivalent, required. \nP.E. licensure required.\n10+ years in the AEC Industry preferred.\nAn understanding of the financial status of projects as they progress, development of cost budgets for projects, value of client relationships and be able to deliver projects with a focus on the quality is required. \nWritten and verbal communication skills commensurate with the position required.\nStrong organizational skills required. \nRevit experience required. \nExperience with computers, specifically for word processing, spreadsheet use/creation and email required. \nDetail-oriented, self-motivated, enthusiastic, flexible and curious personalities required. \nAbility to work well with others under deadline situations required.\nPhysical Requirements\nProlonged periods of sitting at a desk and working on a computer.\nMust be able to effectively communicate in writing and verbally via phone, video conferencing, and in-person.\nVisual acuity to perform responsibilities.\nWork Environment\nWe embrace a hybrid model that promotes both autonomy and collaboration, including the freedom to work from home, with regular in-office days to connect with teammates and build culture. \nThe office is a professional, open-space environment for collaborative and independent work.\nOther Duties\nPlease note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.","description_format":"text","description_chars":5436,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":true},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-05T22:33:05Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":19,"expected_fill_days":94,"reasons":["conf:0","win:early"],"computed_at":"2026-10-25T05:49:26Z"},"pay":{"stated_usd_annual":165000,"is_top_pay":false},"html_url":"https://alion.io/job/hed-mechanical-engineer-mission-critical-2","json_url":"https://alion.io/job/hed-mechanical-engineer-mission-critical-2.json","meta":{"generated_at":"2026-10-25T07:53:17Z","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":11174,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-26T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"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":1967944},"rest":"https://alion.io/mcp/rest/get_company?id=1967944"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fhed-mechanical-engineer-mission-critical-2"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"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%2Fhed-mechanical-engineer-mission-critical-2"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"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%2Fhed-mechanical-engineer-mission-critical-2"},{"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/hed-mechanical-engineer-mission-critical-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fhed-mechanical-engineer-mission-critical-2"}]}