Factory Mechanical Infrastructure Engineer - Equity

Frontdoor Defense; Long Beach (CA); On-site; USD 104,000 - 156,000; Full time

Job summary

Relativity Space in Long Beach, CA is hiring a Construction Mechanical Engineer II to lead the mechanical infrastructure design for the Terran R factory build. This role focuses on HVAC, plumbing, cryogenic and high‑pressure systems, with responsibility from concept to handoff.

You will collaborate across Manufacturing, Propulsion, PBF, Avionics, and Facilities to ensure code‑compliant, safe, and on‑budget delivery. Minimum 2+ years and a BS in Mechanical Engineering are required.

Qualifications

• BS in Mechanical Engineering or related field.

Responsibilities

• Support 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.
• Perform engineering calculations, equipment sizing, load analyses, and system performance evaluations to support efficient, reliable, and code‑compliant mechanical designs.
• Develop and maintain mechanical design documentation, including AutoCAD drawings, Revit models, Basis of Design narratives, technical specifications, and as-built drawings.
• Collaborate with cross‑functional engineering, construction, manufacturing, and facilities teams to ensure mechanical systems are properly coordinated, constructible, and aligned with operational requirements.
• Support mechanical and plumbing projects from initial concept and design through construction, commissioning, and final handoff, including scheduling, budgeting, risk assessment, and documentation.
• Review designs, drawings, and submittals from external consultants and vendors to ensure compliance with applicable codes, industry standards, project specifications, and safety requirements.
• Conduct site inspections, troubleshoot technical issues, respond to RFIs, and coordinate with contractors and internal stakeholders to resolve field challenges and maintain project timelines.
• Support system startup, testing, commissioning, and continuous improvement initiatives to enhance the efficiency, reliability, and maintainability of manufacturing and office facilities.

Skills

HVAC system design

Piping & plumbing systems

Code compliance (ASHRAE/UPC/NFPA)

Mechanical load calculations

Basis of Design documentation

Education

Bachelor of Science in Mechanical Engineering

Master's degree in Mechanical Engineering

Tools

AutoCAD

Revit

Job description

Relativity Space in Long Beach, CA is hiring a Construction Mechanical Engineer II to lead the mechanical infrastructure design for the Terran R factory build. This role focuses on HVAC, plumbing, cryogenic and high‑pressure systems, with responsibility from concept to handoff.

You will collaborate across Manufacturing, Propulsion, PBF, Avionics, and Facilities to ensure code‑compliant, safe, and on‑budget delivery. Minimum 2+ years and a BS in Mechanical Engineering are required.