Mechanical Facilities Engineer III

Merrick & Company is seeking a Mechanical Facilities Engineer III to design HVAC and plumbing systems for national defense and other mission-critical projects. The role includes developing coordinated design packages, applying engineering judgment, reviewing designs for quality and code compliance, supporting proposals, and working with clients and multidisciplinary teams.

Responsibilities:

• The Mechanical Facilities Engineer III will work under minimal supervision to design HVAC and plumbing/piping systems for a range of mission critical to mission support projects. This role requires independent execution, sound engineering judgment, and coordination with multidisciplinary teams
• The Mechanical Facilities Engineer III will serve as a key member of a multidisciplinary team, contributing to the delivery of coordinated design packages including drawings, specifications, and calculations. This role may include task-level coordination with engineers and designers. Periodic travel to project sites and other Merrick offices, including international travel, may be required
• Plan, conduct, and coordinate HVAC and plumbing system design, including engineering calculations, system layout, equipment selection, and development of construction documents
• Prepare coordinated construction documents including plans, details, schedules, and specifications (Divisions 22 and 23)
• Apply engineering judgment to resolve design challenges, including non-standard conditions, coordination conflicts, and constructability issues
• Perform QA/QC reviews of mechanical designs to ensure technical accuracy and code compliance
• Support proposal development, including mechanical scope definition, fee estimates, and schedules
• Interface with Federal, State, and Local government clients and participate in design reviews, charrettes, and technical discussions

Requirements:

• Bachelor of Science in Mechanical Engineering from an ABET-accredited program
• Minimum eight (8) years of experience in HVAC and plumbing system design
• Professional Engineer (PE) license required
• Client projects for this position require U.S. Citizenship
• Experience designing HVAC and plumbing systems for commercial, institutional, or federal facilities
• Experience performing engineering calculations and equipment selection for air handling systems, hydronic systems, and building domestic water systems
• Experience developing coordinated construction documents (plans, details, schedules)
• Experience developing and coordinating Division 22 and 23 specifications
• Working knowledge of IMC, IPC, IBC, ASHRAE, SMACNA, and NFPA
• Familiarity with DoD design criteria (UFC, UFGS)
• Experience with HVAC load calculation software (e.g., Trane TRACE or equivalent)
• Proficient in Revit for MEP coordination; familiarity with AutoCAD
• Experience supporting federal or DoD projects (e.g., USACE, AFCEC, NAVFAC)
• Experience supporting construction administration (submittals, RFIs, site visits)
• LEED, Green Globes, or other sustainability accreditation
• Current passport