Suzan DelBene, a longtime Microsoft employee, is resigning from her job as corporate vice president in charge of the Mobile Communications Marketing Group to "pursue other opportunities," according to a spokesman with Microsoft's outside PR firm.

The announcement was made internally this morning. Her responsibilities included global marketing strategy for Windows Mobile. She reported to Pieter Knook, senior vice president of Microsoft's mobile communications business.

DelBene joined Microsoft in 1989, left in 1998 to work at drugstore.com, later led Seattle-based Nimble Technology, and returned to Redmond in 2004 to take on Windows Mobile position. She and her husband, Kurt DelBene, Microsoft's corporate vice president of the Office Business Platform Group, made up the only husband-and-wife team serving in Microsoft's executive ranks.

The spokesman said Suzan DelBene did not indicate what other opportunities she may pursue. A replacement has not been named.

Update: Her last day will be Sept. 1.