The school collapsed into bankruptcy weeks after he left his post as chief executive, and it is now the subject of a federal investigation into financial aid fraud.

He succeeds Anthony Gramer, who left his post as president and chief executive in May.

Ronald L. Walsworth has left his jobs as president and chief executive to pursue other interests.

Mr. Tierney left his job as chief executive at Bain & Company, an international consulting group, and founded a nonprofit.

Mr. McCain, 64, is leaving the Boise, Idaho, company after a 39-year career there, the last 14 as chief executive.

Mr. Chapman, 52, leaves as co-chief executive after making $20 million last year, Wall Street executives said yesterday.

I thought that Duncan Nichol was leaving his post as chief executive of the health service in June.

Mr. Corzine left his position as chief executive of Goldman Sachs in 1999 after having amassed a fortune estimated at $400 million.

Mr. Rossotti, 61, left a successful career as chief executive of a technology and management company in 1997 to try to fix the I.R.S.

Coming off a year of disappointing ratings, the WB network announced yesterday that Jordan Levin would leave his position as chief executive.