IBM Corp. has named Todd Ramsey managing director of its U.S. federal business. He replaces Anne Altman, who recently was appointed general manager of the corporation’s Mainframe Platform group.

Ramsey has more than 30 years of experience helping government clients use information technology to enhance services, improve efficiency and effectiveness of operations, and promote economic development.

Most recently Ramsey led the company’s Global Government and Education organization, which under his leadership grew significantly, IBM said.

He previously served as vice president of IBM’s Federal Systems Division during the 1990s. He was also vice president and general manager for two years of IBM’s Government Industry, Asia/Pacific in Singapore.

The managerial changes are part of a yearlong general transformation within IBM, the biggest such realignment in 15 years, said Lia Davis, an IBM spokeswoman.

IBM, of Armonk, N.Y., ranks No. 18 on Washington Technology’s 2007 Top 100 list of the largest federal government contractors.