By Tracy Idell Hamilton
San Antonio Express-News

Aurora Geis, the embattled chairwoman of CPS Energy's board of trustees, agreed Tuesday to resign.

Geis, who has been under pressure to step down for weeks, said she would leave her seat as soon as soon as a qualified replacement was on board.

"I think this is a great opportunity for a candidate who is willing to serve," Geis said, adding that the process could take four or five weeks.

Geis' replacement must come from the northwest quadrant of San Antonio, the area that Geis represents. People can apply for the volunteer position. The board chooses its member, but the City Council must ratify the choice.

Mayor Julián Castro, who asked Geis to step down, said he hopes the board can discuss a replacement as soon as Monday.

"I appreciate Aurora's service on the board," And I look forward to taking up the issue of her successor on Dec. 14."