Senior Mechanical Engineer - Buildings

WSP is seeking a Senior Mechanical Engineer to join our Property & Buildings team in Irvine, CA. This role is ideal for a motivated engineer with experience across commercial, higher education, multi-family residential, and civic projects, looking to grow within a collaborative, design-focused environment.

About the role

Be involved in projects with our Property & Buildings Team and be part of a growing organization that meets our clients’ objectives and solves their challenges.

Responsibilities

• Perform mechanical engineering design and technical delivery across a diverse portfolio including commercial, higher education, multi-family residential, and civic projects
• Support design of HVAC, air distribution, hydronic, and building systems
• Participate in the full project lifecycle, from concept development through construction and close-out
• Analyze and interpret data from site conditions, drawings, and technical documents to support engineering solutions
• Prepare and contribute to technical reports, specifications, and design documentation
• Ensure designs comply with applicable codes, standards, and sector-specific requirements, including healthcare environments
• Collaborate with multi-disciplinary teams to deliver integrated project solutions
• Support client interactions and project meetings, building strong working relationships
• Mentor junior staff and contribute to team development

Requirements

• Bachelor’s Degree in Mechanical Engineering or Architectural Engineering
• 5+ years of relevant experience in mechanical design for building systems
• Experience supporting projects across commercial, higher education, and multi-family residential and civic projects
• Strong understanding of HVAC systems and mechanical design principles
• Experience supporting projects from design through construction
• Proficiency with Revit, AutoCAD, and related engineering tools
• Strong communication and collaboration skills

Preferred Qualifications

• Professional Engineer (PE) license or on track to obtain
• Experience working on complex commercial, higher education, and multi-family residential and civic projects
• Familiarity with California codes and local jurisdiction requirements
• Experience working with multi-disciplinary engineering teams
• LEED AP or sustainability credentials

Benefits

WSP provides a comprehensive suite of benefits focused on health and financial stability, including:

• Medical, dental, vision, disability, and life coverage
• Retirement savings
• Paid sick leave
• Paid vacation or other personal time
• Paid parental leave
• Paid time off for bereavement, voting, and/or attendance at naturalization proceedings

Pay

Expected salary range: $107,500 - $156,600.

About WSP

WSP USA is the U.S. operating company of WSP, one of the world's leading engineering and professional services firms. We design lasting solutions in the buildings, transportation, energy, water, and environment markets. With over 15,000 employees in more than 300 offices across the U.S., we partner with clients to help communities prosper.

WSP offers a flexible and agile workplace model while meeting client needs, along with a comprehensive benefits package to support employees' health and financial stability throughout their careers.