WATERFORD — Brian A. Orenstein, president and CEO of Charter Oak Federal Credit Union, has been elected chairman of the Board of Directors of the United Way of Southeastern Connecticut.  “It’s an honor for me to chair the United Way board and to work with such a respected team of leaders who care deeply about helping those in need throughout our region,” said Orenstein. “We’re all committed to continue our work this year to advance the common good and create opportunities for a better life for all those living and working here in southeastern Connecticut,” he said. Orenstein was elected to United Way’s Board of Directors in 2014 and was serving as Vice Chairman of the 22-member board prior to his election as board chairman.  Orenstein has served as the chief executive of Charter Oak since 2007.