Jon Ziegler

President, AABC Test and Balance Engineer

Jon began working for General Air Control in 1982 and became President in 1994. Jon’s extensive background in the industry complemented by his leadership abilities, have helped establish GAC as a preferred TAB firm. The longstanding tenure of his staff suggests that Jon has also made GAC a desirable company to work for. Jon’s integrity combined with his commitment to client satisfaction helps to distinguish General Air Control in the test and balance field.

Dennis Cooper

Project Manager, AABC Test and Balance Engineer, ACG CxA

Dennis started working for GAC in 1993, bringing with him five years of TAB experience. Dennis has a keen understanding of both air and hydronic systems, which contributes to his success as both a Test and Balance Engineer and Commissioning Agent. In addition to these responsibilities, Dennis oversees project management and the scheduling of GAC field personnel. His cooperative attitude and dedicated work ethic has earned Dennis the respect of his team and his colleagues.

Angie Ziegler

Vice President, CFO

Angie’s tenure with General Air Control began in 1994 when she and husband Jon purchased the company from its’ founder Joseph Gac. Angie is in charge of business management as well as business development. From the start, Angie and Jon had a desire to create a company that genuinely valued their clients and their employees. Angie has a passion for helping others which enables GAC to give back to the industry and the community that they are grateful to be a part of.