About Us

Williams & Company Consulting Inc. is a management consulting firm that was established in 1929. Williams & Company began providing Environmental Management services in 1989 and became the first third-party administrator in the nation to develop UST compliance software. Williams & Company served as the third-party administrator for the Iowa Petroleum Storage Tank Insurance Fund from 1988 until it was privatized in 2001.

Currently, Williams & Company Consulting, Inc. provides the overall administration of program services for the Missouri Petroleum Storage Tank Insurance Fund (PSTIF) and the Illinois Drycleaner Environmental Response Trust Fund.

Williams & Company, doing business as Petro Classroom, began offering state approved Class A, B and C Operator training in 2007. Petro Classroom offers online Class A, B and C training and classroom training for A and B Operators.

Williams & Company provides comprehensive Spill Prevention, Control, and Countermeasure (SPCC) compliance services for a variety of facilities from farms to bulk oil distributors. Our knowledgeable compliance team has prepared hundreds of SPCC Plans throughout the U.S. and provided clients with the expertise necessary to meet their regulatory compliance requirements.
Our experienced staff is comprised of environmental engineers, geologists, hydrologists, chemists, an attorney and project managers who have supervised a wide variety of environmental activities.

Williams & Company’s experience is extensive and covers a wide range of services. To find out more about our services, visit our other websites:

Petro Classroom


Williams & Company Consulting, Inc.


Williams & Company Communications, Inc.


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