Mechanical Design Engineer

National Design Build Services•Maryland Heights, MO

51d•Hybrid

About The Position

The Mechanical Design Engineer – HVAC & Plumbing Systems is a key technical role responsible for the design and engineering of HVAC and plumbing systems from concept through construction. This position focuses on air distribution, ventilation, refrigeration support systems, and domestic/process plumbing design in complex commercial and industrial environments. You will work closely with field teams, project managers, and preconstruction to ensure systems are engineered for constructability, efficiency, and code compliance.

Requirements

Bachelor’s degree in Mechanical Engineering or related field
5+ years of experience in HVAC and/or plumbing system design
Experience designing systems for commercial and/or light industrial facilities (manufacturing, food processing, distribution, cold storage preferred)
Strong understanding of HVAC systems, air distribution, and plumbing design principles
Proficiency in Revit for mechanical system modeling
Working knowledge of mechanical, plumbing, and energy codes
HVAC/R experience required; refrigeration experience strongly preferred
Self-motivated with strong time management and organizational skills
Ability to thrive in a fast-paced, deadline-driven environment
Strong communication and collaboration skills

Nice To Haves

Experience with large-scale or industrial facilities is a plus

Responsibilities

Design HVAC systems including air distribution, ventilation, and temperature control for commercial and light industrial facilities
Design plumbing systems including domestic water, sanitary waste, venting, storm drainage, and specialty piping systems
Support refrigeration systems design for cold storage and food & beverage facilities
Perform equipment selection (RTUs, AHUs, exhaust fans, pumps, etc.) and system layout
Develop ductwork, piping, and plumbing layouts, risers, and schematics in Revit
Perform load calculations and airflow analysis for HVAC systems
Ensure designs comply with applicable mechanical, plumbing, and energy codes
Develop sequences of operation for HVAC and mechanical systems
Coordinate closely with field teams to ensure constructability and installation efficiency
Coordinate HVAC, plumbing, and refrigeration systems with structural, electrical, and architectural components
Participate in clash detection and model coordination within Revit/BIM environments
Support value engineering and system optimization efforts
Participate in internal turnover meetings to define project scope, risks, resources, schedule, and budget
Collaborate with preconstruction to translate bid concepts into executable designs
Partner with operations teams to ensure alignment on system design and installation approach
Conduct site visits to support quality control, resolve field issues, and assist with commissioning