Big Brothers Big Sisters of Greater Los Angeles Senior Director of Development   Big Brothers Big Sisters of Greater Los Angeles (BBBSLA) seeks an accomplished philanthropic leader to serve as the Agency's Senior Director of Development.   Big Brothers Big Sisters of Greater Los Angeles (BBBSLA) serves close to 1,500 at-risk children and youth (ages 6-22) annually with aspirations to materially grow our footprint, while continuing to lead the Big Brothers Big Sisters national network in metrics that measure the quality and effectiveness of our work. Over the next twenty-five years, BBBSLA intends to improve the lives of a significant proportion of our county's at-risk youth and become a potent