Harrison Consulting is a public relations company headed by E. Bruce Harrison.
Both companies have specislised in "environmental communication" for "a range of service for government, industry and associations."
In a brief note on his website Harrison states that clients of both Harrison Consulting and its predecessor have included "AT&T, General Motors, American Express, Philips North America, and the U.S. Environmental Protection Agency". 
Other SourceWatch resources
1300 Pennsylvania Ave NW Suite 700
Washington, DC 20004