 He attended the UC Berkeley School of Law and graduated with a Juris Doctor in 1972.Paez began his career as a staff attorney for California Rural Legal Assistance, from 1972 to 1974, then as a staff attorney for the Western Center on Law and Poverty, from 1974 to 1976.He joined the Legal Aid Foundation of Los Angeles in 1976 as senior counsel, was director of litigation from 1978 to 1979 and deputy director for litigation, from 1979 to 1980, then was acting executive director and director of litigation, from 1980 to 1981.