Our People

Leslie J. Sawyer headshot
President & Chief Executive Officer
Picture of Mark. E. Smith
Chief Operations Officer
Picture of Joan M. Mazurek
Vice President, Chief Financial Officer
Picture of Kristen R. Hamilton
Manager, Joliet Office
Picture of Gary Flentge, LEHP, MPH, REPA, CESCO
Vice President, Business Development - Health & Safety
Scott Dileto headshot
Vice President, Environmental/Industrial Hygiene
Picture of Howard J. Hamilton, PE, CFM, CPESC
Director, Civil Engineering
Picture of Alex Waite, PE
Director, Construction Engineering
Picture of Lee R. Koehler, PLS
Chief Professional Land Surveyor
Picture of Jason J. Saxton
Administrative Manager, Survey Department
Picture of Celeste N. Baker