Tammy Richards has been appointed as Chief Executive Officer of the Big Brothers Big Sisters Lone Star
, the Irving-based organization announced. She will assume the job effective on October 8. Big Brothers Big Sisters Lone Star is the national organization’s largest agency and Richards comes to the group from her position as associate dean of the Lyle School of Engineering and as executive director of the Infinity Project at Southern Methodist University. Big Brothers Big Sisters is the nation’s largest donor and volunteer-supported mentoring organization.