ST. LOUIS — Tim Hummel of Union, Missouri, has joined Wiegmann Associates as an HVAC service sales engineer. Hummel manages preventative maintenance programs and HVAC installation and repair projects for Wiegmann Associates’ commercial and industrial clients. He also teams with Wiegmann project managers to offer preventative maintenance and service to prospective customers in the St. Louis region.

Hummel has 32 years of experience in the HVAC industry. He holds an associate’s degree in HVACR Technology from Ranken Technical College.