Stephen  Petty Author of Evaluating Organization Development

Stephen Petty

EES Group, Inc.

Stephen E. Petty, P.E., C.I.H. is president and owner of EES Group, Inc (, a forensic engineering and environmental health and safety (EHS) corporation. EES Group, Inc. was founded in 1996; since that time he has conducted or supervised thousands of forensic investigations and served as an expert witness in over 200 legal cases. He practices in the fields of chemical, civil, environmental, and mechanical engineering as well as the field of industrial health and safety. Mr. Petty


Mr. Petty is currently President of Engineering & Environmental Services, Inc. (EES).  He also served as an Adjunct Professor at Franklin University, where he taught courses in environmental and earth sciences.  Prior to starting EES Group, Inc. in 1996, Mr. Petty was the Manager of Residential and Commercial Technology at Columbia Energy and a Senior Research Engineer at Battelle.  He has 32 years of forensic engineering, health and safety, environmental engineering, and energy experience.  Since 2002, he has completed or supervised over 4,000 engineering forensics and health and safety projects for nearly 50 clients.  His health and safety experience has focused on exposure assessments for the insurance industry, the legal community (expert witness), institutions, and the private sector.  He has expertise on HVAC systems, holds nine U.S. patents, has experience working with the commercial and industrial sectors, and has served as an expert witness in this area.  Mr. Petty has been involved in over 200 expert witness cases to date, with a primary focus on exposure to organic chemicals, inorganic chemicals, mold, and bacteria (legionella).  He has also testified on building envelope and roof damage claims.  His company assembled a nine-member team of experts that won the expert witness contract for the Ohio School Facilities Commission (2004-2008).  His safety and environmental experience includes completion of many complex projects in Risk Assessment (BUSTR, EPA and VAP), Industrial Hygiene, Process Safety Management (PSM), Risk Management Plans (Health and Safety Audits), EA and EIS, and air and water permits (PTI, PTO, NPDES, etc.) for numerous clients across the U.S.  He has served in a leadership role in technology evaluations, business plans and product development activities for dozens of products and ventures.  He has been the invited dinner/lunch speaker to ASHRAE/AIHA and legal association functions.


    B.S.Ch.E., University of Washington, Seattle, WA, 1979
    M.S.Ch.E., University of Washington, Seattle, WA, 1982
    M.B.A. Dayton University, Dayton, OH 1987

Areas of Research / Professional Expertise

    Heat Pumps; Residential and Commercial Appliances, Desiccant Dehumidification Systems, Natural Gas Vehicles, Fuel Cells.

Personal Interests

    Coaching (Basketball, Soccer and Baseball) and Coin Collecting



Featured Title
 Featured Title - Forensic Engineering: Damage Assessments Resident & - 1st Edition book cover


EES Group, Inc. Forensic Engineering Book Signing Event

By: Stephen Petty
Subjects: Engineering - Civil

This book is intended to serve as a comprehensive resource to bridge engineering disciplines with the building sciences and trades (e.g., carpentry, masonry, and plumbing) disciplines.  This is necessary to excel in the field of forensic engineering, particularly for those working for, or in, the insurance industry assessing claims.  Oftentimes, those entering the field are engineers or those with a science background who lack the knowledge in building sciences, trades, and codes and standards associated with roofing systems, building envelope systems, carpentry, plumbing, wiring, and masonry.