Morrison arrived at ASRT in 1993, and he has served in a variety of positions, including director of continuing education, chief operating officer, associate executive director, and deputy chief executive officer. He also helped create the ASRT Museum and Archives and acted as executive director of it.

He has been honored by the U.S. Food and Drug Administration (FDA) for his work on the Image Gently campaign, and he is a trustee emeritus of the National Atomic History Museum Foundation, the ASRT said.