Established in 1927 as Toledo Testing Laboratory, TTL Associates, Inc. has grown to be a full-service environmental, geotechnical engineering, industrial hygiene,  materials testing, and drilling firm. We focus primary on the following markets: Commercial, Development / Redevelopment, Education, Energy, Healthcare, Federal , Local and State Government, Industrial, Retail and Transportation.

TTL Associates was established under the leadership of Thomas R. Uhler, P.E. as a Service Disabled Veteran Owned Small Business (SDVOSB). We also are an Ohio Edge firm. Robert S. Ruse,Ph.D., P.E. serves as our president and leads a team of 110 associates.

TTL’s executive management committee includes Mr. Uhler and Mr. Ruse along with Vice Presidents Curtis Roupe, P.E., Jeff Elliott, P.E, Scott Heisey, P.E., Timothy Pedro, Environmental Manager Martha Thompson P.E. and Controller Melissa Stasko.