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. TTL serves local, regional, and federal clients across the country from our headquarters in Toledo, Ohio and branch offices located in Cleveland, Ohio; Plymouth, Michigan; Denver, Colorado; and Washington, DC. Established under the leadership of Retired Lt. Col. Thomas R. Uhler, P.E., CEO, TTL is recognized as a verified Service Disabled Veteran Owned Small Business (SDVOSB).
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