English will be succeeded by Harold Kutner, former vice-president of worldwide purchasing at General Motors.
Bruce Swift, former vice-president of purchasing at Ford of Europe, has joined Covisint as president and chief operating officer.
Before signing on with Covisint in April 2001, English was a managing director and chief executive officer for e-commerce at Credit Suisse First Boston. Prior to that, he was chairman and chief executive officer of TheStreet.com, a financial news Web site.
English said he was leaving the company as it is poised to become profitable by the end of the year.
Covisint spokesman, Dan Jankowski, said English had accomplished his goal of putting the company on the road to profitability, which it should reach in the fourth quarter. He said English decided to leave Covisint to be closer to his family on the East Coast, where he would pursue other business opportunities.
Covisint was formed in 2000 by GM, Ford Motor and DaimlerChrysler, as a single business-to-business exchange for automating purchases of goods from suppliers.