“In this role, I’ve had the joy of working with some of the smartest, most dedicated colleagues within my office, throughout the agency and across the U.S. government,” Marston said on LinkedIn. “I am sad that this chapter is coming to an end and very sorry for others experiencing the same.”

Marston was the primary clinical advisor to the FDA commissioner and “leads programs and cross-cutting initiatives that support the FDA’s centers in making effective, safe, and innovative medical products available to the American people,” the FDA’s website says. “These include efforts to ensure timely review of combination products, incentive programs to promote interventions for rare diseases, and dedicated labeling for pediatric patients.”