Musselman has studied Bible plants for three decades and has published several books — including Jordan in Bloom (2000), which was commissioned by Queen Rania Al-Abdullah — and numerous articles on their identification, symbolism, and use in the holy writings.
He received his Ph.D. in botany from the University of North Carolina, Chapel Hill, and is currently the Mary Payne Hogan Professor of Botany and chair of the department of biological sciences at Old Dominion University in Norfolk, Virginia. In May 2004, he was awarded the Provost's Award for Leadership in International Education.
In 1984 Musselman established the Blackwater Ecologic Preserve on land that was donated by Union Camp Corporation (now International Paper). He is currently responsible for the development and execution of management and monitoring plans, coordination with state and private partners, and overseeing the general use of the property.