TTL Associates, Inc.


Established in 1927 as Toledo Testing Laboratory, TTL Associates, Inc. has grown to be a full-service environmental/health and safety, testing, inspection and geotechnical engineering firm, serving private and public entities, including the Federal government agencies throughout the United States.

Established under the leadership of Thomas R. Uhler, P.E., CEO, as a Service Disabled Veteran Owned Small Business (SDVOSB), TTL is also EDGE certified by the State of Ohio in addition TTL is a verified State of Ohio veteran friendly business enterprise.  Today, Robert S. Ruse, Ph.D., P.E., LEED AP, serves as our president.  TTL has grown to multiple locations and is headquartered in Toledo, Ohio with branch offices in Cleveland, Ohio, Plymouth, Michigan and maintains division office to serve the Federal Government in Washington, DC metropolitan area and Denver, Colorado.

TTL’s staff includes certified industrial hygienists; professional geotechnical engineers; professional geologists; hazardous materials managers and technicians; environmental microbiologists; AHERA building inspectors and management planners; lead-based paint inspectors and risk assessors; environmental project management analysts; certified roof inspectors; mold, asbestos and lead inspectors; environmental research scientists and technicians; drilling experts; and Ohio Department of Transportation (ODOT) and NICET-certified construction material testing technicians.

TTL’s staff is supported by a Certified Independent Construction Laboratory for Quality Construction Material Testing Services.  In addition, TTL’s in-house asbestos laboratory is accredited by the National Voluntary Laboratory Accreditation Program (NVLAP).  Also, our geotechnical and materials testing laboratories are accredited by the American Association of State Highway and Transportation Officials (AASHTO) and validated by the US Army Corps of Engineers (USACOE) to perform testing services.

Our market segments include commercial, industrial, private, educational, retail, architectural, engineering, construction, developers, health care, transportation, energy, and public entities including city, county, state and federal agencies.

TTL’s Management Team is “hands-on,” dedicated to approaching each project with a client-oriented, business management mindset.  This approach fosters the development of innovative, value-driven and cost-effective solutions to the unique challenges faced by our clients.  TTL’s dedication to excellence and client service is evidenced by the long history of repeat business we gratefully enjoyed over the last 92 years.

Our team strives to be responsive, honest and committed to providing you with experience, manpower, resources and the equipment needed for a successful project.

Our Mission Statement best summarizes TTL’s team approach: Providing quality, responsive cost- effective environmental, health/safety and geotechnical engineering consulting services and solutions.

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