Senior Building Mechanical Engineer

At HDR, our employee-owners are fully engaged in creating a welcoming environment where each of us is valued and respected, a place where everyone is empowered to bring their authentic selves and novel ideas to work every day. We foster a culture of inclusion throughout our company and within our communities, constantly asking how we impact the world.

As part of HDR's Building Engineering Services Group, you will help design critical infrastructure that supports the digital age and shapes the spaces where people work, connect, and thrive. Your work will directly support technological advancement, sustainability, and human experience, enabling high‑performance data centers, dynamic commercial environments, and other next‑generation facilities. This role offers the opportunity to lead innovation, engineer impact, and build a legacy of excellence.

In the role of Senior Building Mechanical Engineer, we will count on you to:

• Lead the mechanical design team through all project phases, from feasibility studies to project close‑out
  • Write and edit mechanical specifications to fit project requirements
  • Review mechanical documents for conflicts with all disciplines
  • Use fan and pump curves to select equipment for different applications
  • Perform psychrometric calculations for HVAC system selection
  • Develop sections, elevations, and air and water flow diagrams for complex ductwork and piping areas
  • Coordinate HVAC control requirements with controls engineers to develop control diagrams, point lists, and sequences of operation
  • Visit project sites to verify existing conditions, monitor construction progress, and prepare field observation reports
• Establish and participate in meetings and reviews with governing agencies for code compliance
• Coordinate workload, complete project assignments, and deliverables on schedule
• Conduct virtual and on‑site work sessions with other disciplines, owners, clients, contractors, and stakeholders, including presentations
• Develop project hours to complete mechanical design documents for RFPs
• Coordinate and assist affected disciplines with project addenda, RFIs, change proposals, and change orders, ensuring changes are incorporated into project documents
• Develop plumbing riser diagrams and perform plumbing calculations (storm, drainage, and supply fixture units)
• Size plumbing equipment and piping (pumps, water heaters, drainage pipes, natural gas piping, valves, etc.)
• Develop and edit Masterspec specifications to be project specific, including creating specs from manufacturer baselines
• Work with the Project Manager, Regional Controller, and Regional Director for project reviews with corporate management as needed
• Actively participate in the education of inexperienced engineers
• Perform other duties as required

• Bachelor's Degree in Mechanical Engineering or Architectural Engineering with Mechanical Focus
• Understanding of applicable design codes and specification requirements
• Significant experience designing complex and large‑scale laboratory and healthcare facilities and/or data centers
• Proficiency in Revit and Microsoft Office
• Experience using load calculation software, energy modeling software, and manufacturer equipment selection software
• Excellent organizational and communication skills
• Ability to work independently and as part of a large project team, taking ownership of assignments
• Strong motivation, organization, and professional initiative
• Client‑focused mindset
• Strong mentoring skills (highly preferred)
• Knowledge of Building Codes in Washington State and how to obtain building codes from other states
• Knowledge of Plumbing and HVAC fundamentals and design
• Previous experience with an A/E/C firm
• Active participation in industry organizations, professional development seminars, courses, workshops, or conferences (approved in advance)

• Bachelor's degree in Mechanical Engineering
• Minimum of 10 years in mechanical system design for commercial or institutional buildings
• Professional engineering license recognized by the licensing board for the position location (e.g., PE or P.Eng)
• Strong knowledge of Microsoft Office, MS Project, and AutoCAD
• Demonstrated leadership skills,…