Senior Mechanical Engineer - Buildings

Job-ID: 88965Category: EngineeringLocation: Irvine, CA, United StatesPosted: 2026-06-11This OpportunityWSP is currently initiating a search for a Senior Mechanical Engineer to join our Property & Buildings team in Irvine, CA.This role is ideal for a motivated engineer who brings experience across sectors, including commercial, higher education, and multi-family residential and civic projects, and is looking to grow within a collaborative, design-focused environment.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. Your ImpactPerform mechanical engineering design and technical delivery across a diverse portfolio including commercial, higher education, multi-family residential, and civic projectsSupport design of HVAC, air distribution, hydronic, and building systemsParticipate in the full project lifecycle, from concept development through construction and close-outAnalyze and interpret data from site conditions, drawings, and technical documents to support engineering solutionsPrepare and contribute to technical reports, specifications, and design documentation Ensure designs comply with applicable codes, standards, and sector-specific requirements, including healthcare environmentsCollaborate with multi-disciplinary teams to deliver integrated project solutionsSupport client interactions and project meetings, building strong working relationshipsMentor junior staff and contribute to team developmentWho You AreRequired QualificationsBachelor’s Degree in Mechanical Engineering or Architectural Engineering5+ years of relevant experience in mechanical design for building systemsExperience supporting projects across commercial, higher education, and multi-family residential and civic projectsStrong understanding of HVAC systems and mechanical design principlesExperience supporting projects from design through constructionProficiency with Revit, AutoCAD, and related engineering toolsStrong communication and collaboration skillsPreferred QualificationsProfessional Engineer (PE) license or on track to obtainExperience working on complex commercial, higher education, and multi-family residential and civic projectsFamiliarity with California codes and local jurisdiction requirementsExperience working with multi-disciplinary engineering teamsLEED AP or sustainability credentialsWSP Benefits: WSP provides a comprehensive suite of benefits focused on a providing health and financial stability throughout the employee’s career. These benefits include coverage related to medical, dental, vision, disability, and life; retirement savings; paid sick leave; paid vacation (or other personal time); paid parental leave; and paid time off for purposes of bereavement, voting, and/or attendance at naturalization proceedings. Compensation:Expected Salary: $107,500 - $156,600WSP USA is providing the compensation range that the company in good faith believes it might pay and/or offer for this position within the state of Colorado, based on the successful applicant’s education, experience, knowledge, skills, and abilities in addition to internal equity and specific geographic location. WSP USA reserves the right to ultimately pay more or less than the posted range and offer additional benefits and other compensation, depending on circumstances not related to an applicant’s sex or other status protected by local, state, and/or federal law.#LI-JM1About the companyAbout WSPWSP USA is the U.S. operating company of WSP, one of the world's leading engineering and professional services firms. Dedicated to serving local communities, we are engineers, planners, technical experts, strategic advisors and construction management professionals. WSP USA designs lasting solutions in the buildings, transportation, energy, water and environment markets. With more than 15,000 employees in over 300 offices across the U.S., we partner with our clients to help communities prosper.WSP provides a flexible and agile workplace model while meeting client needs. Employees are also afforded a comprehensive suite of benefits including medical, dental, vision, disability, life, and retirement savings focused on providing health and financial stability throughout the employee’s career.At WSP, we want to give our employees the challenges they seek to grow their careers and knowledge base. Your daily contributions to your team will be essential in meeting client objectives, goals and challenges. Are you ready to get started?WSP USA (and all of its U.S. companies) is an Equal Opportunity Employer Race/Age/Color/Religion/Sex/Sexual Orientation/Gender Identity/National Origin/Disability or Protected Veteran Status.The selected candidate must be authorized to work in the United States.NOTICE TO THIRD PARTY AGENCIES:WSP does not accept unsolicited resumes from recruiters, employment agencies, or other staffing services. Unsolicited resumes include any resume or hiring document sent to WSP in the absence of a signed Service Agreement where WSP has expressly requested recruitment/staffing services specific to the position at hand. Any unsolicited resumes, including those submitted to hiring managers or other business leaders, will become the property of WSP and WSP will have the right to hire that candidate without reservation – no fee or other compensation will be owed or paid to the recruiter, employment agency, or other staffing service.