WaterStone Financial in Wauwatosa, Wis., has promoted from within to fill its chief financial officer role.

The $1.7 billion-asset company said this week that it had named Mark Gerke senior vice president and CFO of the company and its WaterStone Bank subsidiary.

Gerke, the company's vice president, controller and principal accounting officer since 2014, was appointed interim CFO when Allan Hosack resigned as top financial executive in February after two years with the company.

Before joining WaterStone Bank as a corporate controller in 2005, Gerke served in various positions with the professional services firm Ernst & Young.

Kyle Mertz, an assistant controller for WaterStone, will succeed Gerke as controller.

"Mark and Kyle were instrumental in our public offering in 2014 and all our financial reporting since," Doug Gordon, WaterStone Bank's president and chief executive, said in a news release Monday. "They are now taking expanding roles in our investor relations and strategic initiatives."

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