A Cincinnati nonprofit serving Dayton-area seniors for more than four decades has a new board chair. People Working Cooperatively announced that Brian Thomas, a board member for 12 years and a partner at Graydon, has been elected chairman of the nonprofit’s board of trustees. Thomas succeeds Rick Zoller, whose term expired. “Brian has been a supporter of PWC for many years, and he’s been out in the community volunteering and helping our low-income, elderly and disabled neighbors to stay in…