Trexler and Associates, Inc.

TREXLER CLIMATE AND Energy Services, Inc. (TC+ES) was founded as Trexler and Associates, Inc. (TAA) in the year 1991 by Dr. Mark C. Trexler, formerly of the World Resources Institute in Washington, D.C. TC+ES is based in Portland, Oregon. TC+ES was the company that wrote the first contracts for carbon offset, and designed the first methane carbon offset project for a coal mine.

Until 1997, the company was the only one serving the private sector in climate change mitigation services. That same year, TAA worked with Stony-field Farm and its New Hampshire facility, helping the company to become the United States' first “greenhouse gas (GHG) neutral” facility. In 2000, TAA assisted Shaklee Corporation in its application to the Climate Neutral Network for the pilot certification of “Climate Neutral”. The Climate Neutral Network awarded these certifications to companies who submitted worthy applications; it was to close down in 2007.

In 2002, TAA became partly run by Japan's Sumitomo Corporation. Sumitomo was established in 1919 as Osaka Hokko Kaisha Ltd., and adopted the English name Sumitomo Corporation in 1978.

Since its founding, TC+ES has worked with over 100 companies, large and small, in over 20 nations. Some of its better-known clients include the Chevron Research and Development Corporation, Fannie Mae, Nike Inc., Stonyfield Farm Inc., The Nature Conservancy, and the U.S. Department of Energy, and other institutions.

Services provided by TC+ES include achieving GHG neutrality, building ghg competitive advantage, customized price curve development, GHG inventory support, internal cost curve development, mitigation portfolio development, power plant siting and offset strategies, project design document (pdd) services, risk and opportunity assessment, and Sarbanes-Oxley compliance.

The company frequently publishes papers and reports regarding environmental strategizing and financial planning for companies interested in incorporating environmental responsibility.