HVAC Design Engineer - Design-Build Projects

Location

Location: Grafton, WI office.
Project Coverage: Milwaukee, Madison, and Green Bay metro areas.
Job Type: Full-Time.
Industry: HVAC / Mechanical Construction.

We are a fast-growing HVAC contractor operating throughout Wisconsin, Illinois, Indiana, and Florida, serving multi‑family, commercial, K–12, municipal, hospitality, and other markets. Our company differentiates itself through strong project execution and internal engineering design capabilities, allowing us to successfully deliver design‑build and design‑assist projects.

With expansion plans across the Midwest and the Southeast, we are building a team of leaders who want to grow with the organization. We value professionals who bring an entrepreneurial mindset, take ownership of their work, and thrive in a dynamic environment.

We are seeking an HVAC Design Engineer who will play a key role in the design, coordination, and execution of HVAC systems for commercial, multifamily, and municipal projects. This position is ideal for a motivated professional with 2–5 years of experience who is eager to expand their technical expertise within a rapidly scaling organization.

The HVAC Design Engineer will collaborate closely with Project Managers, internal engineering staff, field teams, and clients to develop practical, efficient, and code‑compliant HVAC system designs.

• Design HVAC systems including load calculations, equipment selection, ductwork and piping layouts.
• Develop construction documents, drawings, and specifications.
• Perform energy calculations and ensure compliance with applicable codes and standards.
• Coordinate with architects, structural engineers, and other trades.
• Support design‑build and plan‑spec projects from concept through construction.
• Participate in project meetings and provide technical input.
• Review submittals and assist with RFI responses.
• Conduct site visits as needed to verify field conditions and support project teams.
• Contribute to value engineering and cost‑optimization efforts.
• Assist in developing internal engineering standards and best practices.
• Train junior engineers and/or interns.

• BS in Mechanical Engineering, Architectural Engineering, or a related field.
• 2–5 years of HVAC design experience.
• Current PE certification or a desire to obtain PE certification.
• Strong understanding of HVAC systems, load calculations, and applicable mechanical codes.
• Strong communication and coordination skills.
• Proficiency in AutoCAD and/or Revit.
• Proficiency in Microsoft Office (Excel, Word, Outlook).

• Strong understanding of HVAC systems and mechanical construction practices.
• Experience with commercial, K–12, municipal, or hospitality projects.
• Experience in multifamily projects preferred.
• Experience with public‑sector and prevailing wage projects.
• Design‑build or design‑assist experience.
• PMP, LEED, or similar certifications.
• Familiarity with Wisconsin and Florida codes is a plus.
• Based out of our Grafton, WI office.
• Supports projects in the Milwaukee, Madison, and Green Bay metro areas.
• Regular visits to active construction sites.