Starting in 1946 Grigsby severed as the Founder and Chair of the Art Department at Carver High School for eight years, followed by serving as the Chair Phoenix Union High School until 1966 when he became a professor in the School of Art at Arizona Sate University.
Starting in 1946 Grigsby severed as the Founder and Chair of the Art Department at Carver High School for eight years, followed by serving as the Chair Phoenix Union High School, once Carver High School closed after desegregation. In 1966 he became a professor in the School of Art at Arizona Sate University.