HVAC Mechanical Design Engineer – BIM​/Design-Build

Compensation: $90,000 – $130,000 Base Salary + Full Benefits + Bonus Potential

We are seeking a highly motivated Mechanical Design Engineer to join a growing design-build mechanical contractor in the St. Louis market. This individual will play a key role supporting the design, coordination, and execution of complex commercial and industrial mechanical construction projects. The ideal candidate will have strong HVAC system design experience and a desire to work closely with both engineering and construction teams in a fast-paced design-build environment.

This is an excellent opportunity for someone looking to gain exposure to large-scale projects while working alongside experienced project managers, engineers, and field operations teams.

• Design and develop HVAC and mechanical systems for commercial and industrial construction projects
• Produce load calculations, equipment selections, and system layouts
• Develop construction documents, shop drawings, and coordinated BIM/Revit models
• Coordinate with project management, field operations, subcontractors, and clients throughout project lifecycle
• Assist with design-assist and design-build project delivery
• Support value engineering efforts and constructability reviews
• Participate in project meetings and coordination sessions
• Review project specifications, submittals, RFIs, and mechanical plans
• Ensure designs comply with applicable codes, standards, and client requirements
• Support commissioning and project closeout activities as needed

• Commercial HVAC Systems
• Industrial / Manufacturing Facilities
• Mission Critical / Data Centers
• Higher Education
• Laboratories / Life Sciences
• Distribution & Warehouse Facilities

• Bachelor’s Degree in Mechanical Engineering or related field preferred
• 2–10+ years of experience in mechanical HVAC design or mechanical construction engineering
• Experience working with Revit, AutoCAD, and BIM coordination tools
• Understanding of HVAC systems including:
• VAV Systems
• Chilled Water Systems
• VRF Systems
• Rooftop Units
• Air Handling Units
• Central Plants
• Hydronic Systems
• Design-build or construction-focused engineering experience is highly preferred
• Strong communication and coordination skills
• Ability to work in a collaborative team environment
• Annual Bonus Potential
• Full Medical, Dental, and Vision Coverage
• 401(k) with Company Match
• PTO and Paid Holidays
• Career Growth Opportunities within a Growing Organization