 He graduated from Cameron State Agricultural College and from the University of Oklahoma with a Bachelor of Science in Math and Education.After college, Lamb began a career in law.He served as Assistant County Attorney for Chickasha, Oklahoma (1963–1964), as Assistant Municipal Counselor of Oklahoma City, Oklahoma (1964–1965), and then as Chief Prosecutor and Assistant District Attorney for Garfield County, Oklahoma from 1967 to 1970.