Mechanical Principal
EXP U.s. Services
San Francisco, CA · Posted August 11, 2026
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November 2026
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How AI is used in this kind of work
AI use among maintenance and repair workers, general is little observed so far. Measured exposure for maintenance and repair workers, general: 0% (little observed).
Share of this job’s tasks that AI is already used for at work, from real usage. It is not a forecast of job loss, and a low number means no use seen yet. Source: Anthropic Economic Index.
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About the job
At EXP, we’re driven to provide innovative solutions for the world’s built and natural environments. As a team of engineers, architects, designers, scientists, creators and a community of professionals, we bring diverse and talented people together to solve the world’s most complex challenges. Here, you join a team that leverages differences, harnesses their entrepreneurial spirit in an employee-owned company, that believes diversity is what gives us strength, seeks sustainable results and shares ambitions for each other, our clients and the communities we are part of and serve. To be a part of EXP means to have your own experience, while staying connected to a global network of professionals, who believe we are a part of something bigger. Together, we are EXP.
Are you ready to design your future?
Be our next Principal Mechanical Engineer
Your work environment at EXP
In this role, you will be a part of the MEP team, of the Buildings sector (Science/Technology & Life Sciences projects) , based in San Francisco, California or Walnut Creek, California.
What a day at EXP has in store for you
Identify, research, and qualify RFP/ RFQ’s and upcoming projects for go/no go potential
Direct and lead submittals in response to RFP/ RFQ’s.
Manage existing and develop new client relationships
Perform at a ‘responsible charge’ level; meeting exp’s design and quality levels
Manage work plans and deliverables on multiple projects within budgeted hours
Work with project team and clients to meet scheduled project milestones on multiple projects
Apply risk management procedures daily to minimize exp’s and client’s exposure to problems
Understand MEP/FP work planning and manage design process to the available hours in work plan
Understand proper scope of MEP/FP SD, DD, CD level documents – and deliver appropriate documentation
Coordinates with other disciplines (MEP/FP, architectural, structural, etc)
Edit and develop scope of work narratives (SD narrative, basis of design, etc)
Develop equipment room sizes during SD and DD phases
Thorough knowledge of Mechanical/Electrical codes
Advanced equipment selection and analysis (generators, UPS units, chillers, boilers)
Be able to direct and mentor designer level staff on all of their responsibilities on a daily basis
QA/QC reviews of all calculations by designers, and provide guidance and mentoring
Understand and apply concepts of CHW, HW, WSHP, variable & constant flow systems.
Advance equipment selection and analysis – chillers, boilers, air terminals, cooling towers, HEPA filters, DX equipment, and water source heat pumps.
What your experience looks like
Candidate should have an engineering Bachelor's degree in the field of HVAC/Mechanical Engineering with15+ years of building HVAC and piping design experience.
Experience in designing HVAC systems for Science/Technology, Life Sciences or Healthcare projects.
Experience with Project Management and leading multidisciplinary team projects
Registered Professional Engineer (P.E.) preferred.
REVIT MEP Proficiency required.
The pay range for this role is $160,000 to $200,000. Actual compensation packages are based on several factors that are unique to each candidate, including but not limited to skill set, depth of experience, certifications, and specific work location. This may be different in other locations due to differences in the cost of labor.
Our story
With a mission to understand, innovate, partner and deliver, EXP provides engineering, architecture, design and consulting services to the world’s built and natural environments.
Our heritage dates back to 1906, when the earliest of EXP’s predecessor companies started its engineering infrastructure practice. Today, thousands of creative professionals across EXP work together to deliver extraordinary experiences year after year.
What makes us different
The passion, enthusiasm, diversity and industry-leading capabilities of our employees make us who we are. We’re committed to providing a challenging work environment that cultivates career growth, encourages creativity and rewards excellence.
Find out more about life at EXP by visiting www.exp.com .