We are hiring a full-time HVAC Mechanical Engineer to support our AC Install department in Fullerton, CA. This role plays a key part in the design/build process for commercial and light industrial HVAC systems, with a strong focus on energy efficiency, Title 24 compliance, and system performance. The position involves approximately 70% field work and 30% office-based design, serving clients across Southern California. Key Responsibilities + Design HVAC systems including heat load calculations, duct and pipe sizing, and layout planning. + Use EnergyPro software to generate Title 24 compliance reports. + Collaborate with CAD drafters to produce permit-ready mechanical drawings. + Conduct site visits and job walks to gather field data and validate designs. + Coordinate with internal teams, vendors, and installers to resolve technical challenges. + Ensure systems meet California mechanical/building codes and ASHRAE standards. + Select and size HVAC equipment such as boilers, chillers, ammonia systems, and ventilation components. + Support project engineers during proposal, permitting, and construction phases. Required Qualifications + Minimum 5 years of experience in the HVAC industry, preferably in commercial or industrial projects. + Proficiency in EnergyPro software. + Strong understanding of California codes, Title 24, and ASHRAE standards. + Bachelor’s degree in Mechanical Engineering (preferred). + OSHA 30 certification (or willingness to complete—training provided). + Ability to read blueprints and collaborate with field teams including installers, welders, and pipe fitters. Preferred Qualifications + PE license in California (preferred but not required). + Experience working with boilers, chillers, ammonia systems, and large-scale refrigeration systems. + Familiarity with RSD suppliers and permitting processes. + Prior experience in construction, welding, or mechanical trades is valued. Why Join Us? + Be part of a family-owned, fast-growing company with a strong reputation in HVAC design-build. + Work on impactful projects in food manufacturing, distribution, and retail. + Opportunity to double your salary within a year based on performance. + Competitive compensation and benefits package. + Supportive leadership and a collaborative team environment. Pay and Benefits The pay range for this position is $70000.00 - $100000.00/yr. 401(k) matchingDental insuranceHealth insuranceLife insurancePaid time offVision insurance Workplace Type This is a fully onsite position in Fullerton,CA. Application Deadline This position is anticipated to close on Aug 22, 2025. About Actalent Actalent is a global leader in engineering and sciences services and talent solutions. We help visionary companies advance their engineering and science initiatives through access to specialized experts who drive scale, innovation and speed to market. With a network of almost 30,000 consultants and more than 4,500 clients across the U.S., Canada, Asia and Europe, Actalent serves many of the Fortune 500. The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law. If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing due to a disability, please email actalentaccommodation@actalentservices.com (%20actalentaccommodation@actalentservices.com) for other accommodation options.