Dr. Weinberger began his "career" in the late '70s teaching philosophy at New Jersey's Stockton State College for five years. (He has a Ph.D. in philosophy from the University of Toronto.) During this time he maintained his steady freelance writing of humor, reviews and intellectual and academic articles, publishing in places as diverse as The New York Times, Harvard Business Review, Smithsonian, Alfred Hitchcock's Mystery Magazine and TV Guide.

In 1985, after being denied tenure because the tenure quota was filled, and after an enthusiastic but well-mannered student demonstration in his support, he became a junior marketing guy at Interleaf, at that point an innovative start-up with new ideas on how to create and structure documents. At Interleaf he helped launch the industry's first document management system and its first electronic document publishing system, years ahead of the Web. He left Interleaf after 8 years, as VP of Strategic Marketing.

He founded the one-person strategic marketing company, Evident Marketing, in 1994 and within two years counted among his clients a wide variety of companies, including RR Donnelley, Intuit, Sun Microsystems, Esther Dyson's Release 1.0 and CSC Index.

In late 1995, he joined Open Text as VP of Strategic Marketing because he saw an opportunity to help shape the way intranets are used. As part of the senior management team, Dr. Weinberger helped Open Text move from one of the first Web search engine companies (the engine behind Yahoo!) to market- and thought-leadership in Web-based collaborative software.

After helping to take Open Text public in 1996, Dr. Weinberger returned to consulting, writing and speaking, helping to found a couple of dot-coms, and serving on industry and company boards. In 2000, Perseus published The Cluetrain Manifesto which became a national best-seller.

In 2002, Perseus published Small Pieces Loosely Joined to enthusiastic reviews.