Bath Group, Inc. was founded in 1957 to provide professional mechanical, electrical, process safety management, and instrumentation engineering services for industrial and governmental clients.  In 2012, Bath Process Safety Management was formed to more effectively market the firm's common sense approach for conducting hazardous area classifications (electrical area classifications).  Since then, the services offered by Bath PSM have expanded to include electrical compliance assessment (findings and remediation), gas monitoring detection design, HAZOP and process safety review support and work process redesign, safety shutdown/process control system review, vessel over-pressure protection review, and building/equipment siting recommendations.

The firm bears the name of its founder, Kenneth A. Bath.  Engineering services are offered by Bath Engineering Corporation and building commissioning services are offered by Bath Commissioning Corporation.