Wiegmann Associates has again been named as one of St. Charles County’s largest businesses by the St. Louis Business Journal ranking at #11 with revenue of 43.6 Million in 2021.

Weigmann has been headquartered in St. Charles since 2002 and employs more than 110 engineers, project managers, building automation specialists, HVAC service technicians and administrative staff.

Wiegmann Associates is a St. Louis-based mechanical contractor and a national leader in design/build HVAC projects. Since 1995, Wiegmann Associates has engineered and installed innovative, energy-saving and cost-efficient HVAC solutions, refrigeration systems and automation controls for clients in a wide range of industries, including senior living, food and beverage distribution, warehouse, healthcare, commercial and industrial. Wiegmann also provides 24-hour preventative maintenance programs and service in the St. Louis region.