[Remote] Mechanical Design Engineer

Note: The job is a remote job and is open to candidates in USA. National Design Build Services is a mechanical design/build firm specializing in HVAC/R systems for commercial and light industrial facilities. The Mechanical Design Engineer – HVAC & Plumbing Systems is responsible for the design and engineering of HVAC and plumbing systems, ensuring compliance with codes and working closely with field teams and project managers.ResponsibilitiesDesign HVAC systems including air distribution, ventilation, and temperature control for commercial and light industrial facilitiesDesign plumbing systems including domestic water, sanitary waste, venting, storm drainage, and specialty piping systemsSupport refrigeration systems design for cold storage and food & beverage facilitiesPerform equipment selection (RTUs, AHUs, exhaust fans, pumps, etc.) and system layoutDevelop ductwork, piping, and plumbing layouts, risers, and schematics in RevitPerform load calculations and airflow analysis for HVAC systemsEnsure designs comply with applicable mechanical, plumbing, and energy codesDevelop sequences of operation for HVAC and mechanical systemsCoordinate closely with field teams to ensure constructability and installation efficiencyCoordinate HVAC, plumbing, and refrigeration systems with structural, electrical, and architectural componentsParticipate in clash detection and model coordination within Revit/BIM environmentsSupport value engineering and system optimization effortsParticipate in internal turnover meetings to define project scope, risks, resources, schedule, and budgetCollaborate with preconstruction to translate bid concepts into executable designsPartner with operations teams to ensure alignment on system design and installation approachConduct site visits to support quality control, resolve field issues, and assist with commissioningSkillsBachelor's degree in Mechanical Engineering or related field5+ years of experience in HVAC and/or plumbing system designStrong understanding of HVAC systems, air distribution, and plumbing design principlesProficiency in Revit for mechanical system modelingWorking knowledge of mechanical, plumbing, and energy codesSelf-motivated with strong time management and organizational skillsAbility to thrive in a fast-paced, deadline-driven environmentStrong communication and collaboration skillsExperience designing systems for commercial and/or light industrial facilities (manufacturing, food processing, distribution, cold storage preferred)HVAC/R experience required; refrigeration experience strongly preferredExperience with large-scale or industrial facilities is a plusBenefitsNDBS offers a competitive compensation and benefits packageStrong opportunities for career growth and advancementClear pathways for career advancement with autonomy and flexibility in an entrepreneurial environmentCompany OverviewNational Design Build Services offers energy-efficient systems, pre-construction, construction management, LEED and commissioning services. It was founded in 2007, and is headquartered in Maryland Heights, Missouri, USA, with a workforce of 51-200 employees. Its website is https://nationaldbs.com/.