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.

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

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