Joseph Mortimer is an experienced professional in the biopharmaceutical field, currently serving as Associate Director at ExpressionEdits since October 2025. Prior to this role, Joseph held various positions at Xap Therapeutics, including Principal Scientist and Senior Scientist, from July 2021 to October 2025. Previously, Joseph worked at GSK from October 2016 to July 2021 as a Scientific Investigator, Senior Scientist, and Cell Biologist, focusing on target biology in oncology cell therapy as well as translational research in cell and gene therapy. Joseph's career began at GSK as an Industrial Placement Student in biopharm innovation from September 2014 to September 2015. Joseph earned a Bachelor’s Degree in Biochemistry with a year in industry from the University of Kent between 2012 and 2016.
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