Morrison was a founding member of the National Society of Black Physicists and one of its first fellows. While on leave from the University of California, Berkeley and teaching at Howard University, Morrison served as a member of the Awards Committee and gave remarks at the first meeting of what would become the NSBP in December 1972. This first meeting honored physicists Halson V. Eagleson, John McNeile Hunter, and Donald A. Edwards. In 1976, following a meeting at Morgan State University, Morrison was part of a group that contributed to the initial plans for the formal NSBP (then called the Society of Black Physicists).