David J. Heather

HVAC Department Manager



Value Delivered

As the HVAC department manager at Illingworth-Kilgust Mechanical’s Milwaukee location, Dave is responsible for negotiating HVAC sales, estimating plan/spec and design/build, and scheduling and managing man power for projects. He also manages the department’s collections and billings and establishes monthly goals along with the yearly budget. Dave oversees the HVAC Engineering and CAD departments and Illingworth-Kilgust’s National Purchasing.


Bringing over 29 years of experience in estimating, project managing, and HVAC sales, Dave has held various positions in the mechanical services industry. He began his career as an estimator and project manager at Midwest Mechanical and worked his way toward roles as senior project manager, division manager, and general manager with various companies. Prior to joining the Illingworth-Kilgust Mechanical team, Dave was employed with a local competitor where he was a business development manager and sales engineer.

Dave graduated from Madison Area Technical College with an Associate Degree in Mechanical Design.

The Personal Side

Dave enjoys traveling, attending sporting events, boating, and golfing.