Dr. Ferrill is a fellow of the American Society of Health-System Pharmacists and the California Society of Health-System Pharmacists, and is an active member of the AACP (American Association of Colleges of Pharmacy), the APhA (American Pharmacy Association), the ASHP, and Rho Chi, an honorary pharmacy society. Dr. Ferrill has served on the Board of Directors for Christian Pharmacy Fellowship International (CPFI) and was the Editor for the CPFI publications, Christianity and Pharmacy Journal and the Faith Script newsletter.