Paul S. Castro, executive director of Jewish Family Service (JFS), has spent his career working on behalf of the disadvantaged and disenfranchised. The 22-year JFS veteran, who became chief executive in 2000, has watched the agency grow exponentially over the past couple decades. Under his direction, JFS has worked aggressively to diversify its funding sources and has increased its endowment from $2 million to more than $7.4 million. JFS, which employs 430 full- and part-time employees at 25 locations throughout Greater Los Angeles, offers counseling, supports the elderly and disabled, provides housing for the homeless and feeds the hungry, among other services.