HVAC Mechanical Engineer HireLiving is partnering with a well-established engineering and commissioning firm in the Atlanta area to identify a talented HVAC Mechanical Engineer. This organization specializes in large scale commercial, institutional, and mission critical facilities where system reliability, safety, and performance are essential. This role supports the commissioning of complex mechanical systems across major campuses and high profile facilities. Engineers in this role gain exposure to large scale central plant environments, advanced building systems, and integrated infrastructure within a collaborative and professional setting. Benefits • Competitive base pay • Year-end bonus • Retirement plan with company matching • Limited travel • Team oriented collaborative growth culture Essential Duties • Perform commissioning and functional performance testing of large scale HVAC systems including chillers, cooling towers, pumps, air handling units, and central plant infrastructure • Must have experience working with multiple chillers ranging from 500 to 2,000 tons each, with total plant capacities ranging from approximately 5,000 to 50,000+ tons • Validate performance of chilled water systems, condenser water systems, and air distribution systems across large facilities • Work with and verify redundant HVAC systems designed for mission critical environments to ensure continuous operation and failover capability • Review, interpret, and validate sequences of operation within advanced Building Automation Systems (BAS) • Identify system deficiencies, troubleshoot performance issues, and support corrective actions during commissioning and turnover • Work within high volume documentation environments including commissioning scripts, reports, and test procedures Required experience • Mechanical Engineer with experience in HVAC systems, commissioning, or large scale commercial or institutional projects • Strong experience with central plant systems, chilled water systems, and high capacity HVAC infrastructure • Familiarity with mission critical environments such as government facilities, data centers, healthcare, or military projects • Working knowledge of BAS controls, system integration, and sequences of operation • Ability to interpret mechanical drawings, specifications, and control strategies