About Us

Celebrating 20 Years!


Headquartered in Dublin, Ohio, Engineering and Environmental Services (EES), or EES Group, Inc., was founded in 1996 by Stephen E. Petty as an engineering and environmental consulting firm.  Mr. Petty recognized the need for a consulting firm that could bring quality services in a timely fashion at competitive prices to its clients.  

Since its inception, our company has been recognized for its responsiveness and quality.  We have developed proven methodologies for determining the cause and origins of failures of building systems affecting structures and/or its occupants based on the knowledge obtained from the completion of thousands of projects.  To this end, in January of 2013, EES published a full color engineering textbook, titled, “Forensic Engineering:  Damage Assessments for Residential and Commercial Structures.”  This textbook is a comprehensive resource that builds a bridge between engineering disciplines and the building sciences and trades, providing an extensive look into the world of forensic engineering.  

EES provides a full range of engineering, industrial hygiene, environmental, health and safety, and expert witness services to a diverse clientele throughout Ohio, West Virginia, Indiana, Michigan, and Kentucky.  We have also completed work for clients in California, Missouri, New Jersey, Pennsylvania, Tennessee, Texas, Virginia, and Washington.  Our staff have the highest credentials in engineering and building systems.  Using our experience as reflected in our credentials and publications, EES continues to work to meet the needs of our clients, which is to provide superior, high quality services within a responsive time frame at a competitive rate.