Even though Alpha Mechanical’s operation in Nashville is brand-new, the team assembled to operate in Central Tennessee has more than 60 years of experience in the industry. George Garcia (left) and John Sechler are expanding Alpha’s operations into Tennessee. John Sechler, who opened the new operation in June, is a third-generation HVAC industry professional working since 1986. He spent nearly two decades at Siemens. Sechler has experience in all aspects of HVAC work and is an instructor at the Local…