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Senior Mechanical Engineer: HVAC & Building Systems

Job in Irvine, Orange County, California, 92602, USA
Listing for: AECOM
Full Time position Listed on 2026-11-15
Job specializations:
Salary/Wage Range or Industry Benchmark: 120000 - 160000 USD Yearly USD 120000.00 160000.00 YEAR

Job Description & How to Apply Below

Work with Us. Change the World.

At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations.

There has never been a better time to be h accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world.

We're one global team driven by our common purpose to deliver a better world. Join us.

AECOM is seeking a SeniorMechanical Engineerbased inOrange, California. This is a Hybrid position.

Join our dynamic team supporting exciting projects!

Work independently and make technical decisions based on building code interpretation as well as company, client, and industry standard practices. Mentor and teach junior engineers. Grow your career with us in our Building+ Places group.

The Senior Mechanical Engineer will be responsible for the following but not limited to;

  • Design of heating, ventilation and air conditioning systems as well as plumbing systems for large projects federal government, commercial, and institutional facilities
  • Perform Construction Administration services, including review of shop drawings, RFI’s and review of contractor proposed change orders
  • Evaluate feasibility of alternative design approaches in conjunction with senior team members
  • Perform site/field visits to ascertain existing conditions including equipment condition evaluations
  • Organize/plan projects to ensure quality controls and project criteria are met and within budget
  • Assist in preparing proposals and presenting to Clients
  • Assist with mentoring of junior staff within the Mechanical Department
  • Review and edit specifications
  • Interact and work with a diverse set of clients and subcontractors
  • Serves as lead engineer on mid - to large size projects.

Minimum Requirements

  • Bachelor’s degree in Mechanical Engineering from an ABET accredited Mechanical Engineering Program
  • 6+ years of experience in mechanical design of HVAC and Plumbing systemsor demonstrated equivalency of experience and/or education
  • This position requires U.S. citizenship due to federal contract/security requirements

Preferred Requirements

  • Professional Engineer (PE) licensure
  • 8+ years of experience in mechanical design of HVAC and Plumbing systems
  • Experience using AutoCAD and Revit
  • Ability to interact with others on a multi-discipline team
  • Ability to work on multiple projects at once
  • Excellent communications skills with the ability to present designs to clients
  • Good time management skills, a strong work ethic and attention to detail
  • Proficient in Building Load Calculation and Energy Modeling
  • Proficient in the design of plumbing systems including sanitary, storm, and water distribution systems
  • Energy Modeling experience a plus
  • Cost estimating experience a plus
  • Experience with Design-Build and other Alternate Delivery practices a plus
  • Experience with Instrumentation and Controls design a plus
  • Excellent Communications Skills with the ability to present designs to clients
  • Additional Industry Certifications such as LEED AP, CxA or CEM
  • Federal experience; NAVFAC, USACE, VAMC, DOD or USAF experience preferred
  • Experience in the following markets:
    Healthcare Data Centers / Mission Critical Higher Education Corporate Commercial / Mixed Use Science & Technology (Labs)
  • U.S Citizenship required due to the nature of the work

At AECOM, we are committed to maintaining a secure and trustworthy recruitment process and take any fraudulent hiring activity seriously. To support this commitment, all newly hired employees are required to attend an in-person Day 1 onboarding at an AECOM office location as a condition of employment.

About AECOM

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options,well-being resources, employee assistance program, business travel insurance, service…

Position Requirements

10+ Years work experience
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