Penton Media CFO Eric Lundberg has left the company to return to ALM as CFO and vice president. Penton CEO John French announced the move in an e-mail to employees this morning.

Lundberg had served as vice president and CFO at ALM from 2003 to 2007. He joined ALM in 1995 and held a number of financial positions, including corporate controller, director of financing and vice president of finance. He joined Penton as CFO last February.

Penton has already begun searching for Lundberg’s replacement, French wrote in the e-mail.

ALM, which is owned by Incisive Media, publishes more than 30 legal and business titles including the American Lawyer, Corporate Counsel and the National Law Journal.