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Mechanical Engineer

Job in Irvine, Orange County, California, 92616, USA
Listing for: Actalent
Seasonal/Temporary position
Listed on 2026-09-17
Job specializations:
  • Engineering
    Mechanical Engineer, Building Services Engineer
Salary/Wage Range or Industry Benchmark: 57 - 72 USD Hourly USD 57.00 72.00 HOUR
Job Description & How to Apply Below

Mechanical Engineer

Put your HVAC and plumbing design expertise to work on mission-critical federal, healthcare, military, and institutional projects where you'll directly own calculations, Revit production, and technical engineering deliverables from concept through construction documentation.

We are seeking a hands-on Mechanical Engineer to support a growing portfolio of federal, military, healthcare, and institutional projects. This role is focused on direct design execution and technical ownership, providing an opportunity to contribute immediately to active projects through HVAC design, plumbing design, mechanical calculations, Revit production, and interdisciplinary coordination.

This is not a project management or oversight-only role. We're looking for someone who actively performs engineering calculations, develops construction documents, and takes ownership of the mechanical systems they design.

Work on federal, military, VA, healthcare, and mission-critical facility projects

Join a team experiencing significant project growth and a strong project backlog

Maintain a hands-on engineering role focused on technical design and production

Opportunity to work on technically challenging building systems projects

Long-term growth potential with conversion intent

Hybrid flexibility available following the onboarding period

This role is ideal for engineers who want to remain actively involved in design and engineering while contributing to meaningful infrastructure and institutional projects. You'll gain exposure to complex mechanical systems, interdisciplinary coordination, and advanced project delivery environments while continuing to develop your technical expertise.

Hourly Pay Range: $57.00 - $72.00 per hour

Compensation is based on hands-on design capability, technical ownership, calculation experience, and the ability to contribute independently to active project work.

Design HVAC and plumbing systems for federal, military, healthcare, and institutional facilities

Perform mechanical engineering calculations, including:

Load calculations

Equipment sizing

Pump calculations

Plumbing calculations

System performance analysis

Produce mechanical drawings and construction documents using Revit MEP

Coordinate with architecture, electrical, structural, and other engineering disciplines

Support multiple concurrent projects while maintaining quality and schedule commitments

Participate in field verification activities and occasional project site visits

Contribute to controls coordination, building automation discussions, and sequences of operation where applicable

Take ownership of project deliverables from design through construction documentation

Help reduce production workload while supporting successful project execution

We're seeking a Mechanical Engineer who can demonstrate direct ownership of HVAC and plumbing design, calculations, and Revit deliverables. The ideal candidate is comfortable working independently, coordinating with multidisciplinary teams, and contributing immediately with limited supervision.

5-10+ years of hands-on HVAC and plumbing design experience

Experience personally designing HVAC systems and plumbing systems

Strong proficiency with Revit MEP

Experience producing construction documents and mechanical drawings in Revit

Ability to independently perform:

Mechanical load calculations

Equipment sizing calculations

Pump calculations

Mechanical system calculations

Experience coordinating with architecture, structural, electrical, and engineering disciplines

Strong understanding of mechanical building systems and constructability

Ability to support multiple projects simultaneously in a fast-paced environment

Strong technical communication skills

U.S. Citizenship required due to federal project requirements

Occasional local site visits for field verification and facility assessments

Most travel consists of short-duration project site visits

Hybrid work environment following onboarding

Initial onboarding period requires increased in-office collaboration

Long-term expectation of approximately three days onsite and two days remote

Professional architecture and engineering office setting

Flexible work schedule options

Collaborative, deadline-driven environment focused on quality and technical excellence

Opportunity to work alongside architects, engineers, and multidisciplinary project teams

If you're a Mechanical Engineer who enjoys owning the design process, performing calculations, producing construction documents, and solving complex engineering…

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