Dairy foods giantDean Foods Company , Dallas, said it promotedShaun Marato chief financial officer effective Dec. 1, upon the resignation of Jack Callahan. Officials said Callahan, CFO and executive vice president, accepted a similar position at another publicly traded company.

Mara, a senior vice president and chief accounting officer, has been with Dean since June, 2010.

"The board, our executive team and I want to thank Jack for his many contributions to Dean Foods. Under Jack's leadership, we began and have made significant progress in our transformation of the business and the finance function," said Gregg Engles, Dean chairman and chief executive officer. "Jack has led the development of strategies to build the supply chain finance organization in support of our transformation initiatives, drove needed realignment of core financial processes and attracted an impressive finance leadership team to Dean Foods."

Mara most recently served as senior vice president of finance for the Wm. Wrigley Jr. Company, a subsidiary of Mars, Incorporated, where he had responsibility for corporate reporting, global finance, and post-merger integration functions.

"With deep experience in food and consumer packaged goods, Shaun is an industry veteran who will contribute immediately to the on-going transformation of the Finance function and Dean Foods more broadly," said Engles. "Driving cost reductions and building the capabilities needed to capture those savings remain the key focus of our long-term strategic growth plan."