Bruce Geller was named CEO of Dalton, Greiner, Hartman, Maher, confirmed spokesman Bob Gorman. Mr. Geller, the firm's co-president, will replace Kenneth Greiner as CEO on Jan. 1, when Mr. Greiner will become vice chairman as part of a strategy to ensure "more definition" around the firm's succession plan, said Mr. Gorman. Stephen Bruno, the firm's other co-president, left the firm to pursue other opportunities, said Mr. Gorman, adding that the firm will no longer have a president after the transition. Also, Jeffrey Baker was named CIO, effective immediately. Former CIO Timothy Dalton will remain chairman.