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about jsa

Johnson, Spellman & Associates, Inc. (JSA) is an Atlanta-based mechanical engineering firm with a rich and diverse history. Since its incorporation in 1986, the two-man firm has evolved into a fully-staffed engineering company. 

JSA provides HVAC, Plumbing, Fire Protection, and Fuel System Engineering Services.  Nearly half of our technical staff are licensed professional engineers, many of whom are  LEED™ accredited professionals.  We hold licenses in 15 states, Puerto Rico, and the US Virgin Islands.

JSA provides a wide range of services from concept budgeting and programming to construction review and special investigation of all types of systems.