Gretchen Allison is Senior Director/Team Leader of Global Quality Validation Services for Pfizer Global Manufacturing. She leads a global team supporting validation activities for commercial manufacturing sites. Gretchen has 30 years of experience in the pharmaceutical industry, including quality control, auditing, product complaint handling, quality assurance, contract manufacturing quality oversight, technical support, and analytical development and validation. Gretchen is a member of ISPE and PDA, and has supported development of numerous industry guidance documents, including PDA TR 29 latest revision on Points to Consider for Cleaning Validation and several ISPE Process Validation Discussion Papers. Gretchen has a BS in Chemistry from the University of Florida.