Dr. Christl is the Director of the Therapeutic Biologics and Biosimilars Staff (TBBS) in the Office of New Drugs in the FDA's CDER. TBBS is responsible for ensuring consistency in the scientific and regulatory approach and advice to sponsors regarding development programs for biosimilar biological products and related issues regarding therapeutic biologics. TBBS is also responsible for developing scientific and regulatory policy as it relates to the review and approval of biosimilar products.