Dr. Elder has 40 years of service within the pharmaceutical industry, with Sterling, Syntex and for the last 23 years with GSK. He is now an independent CMC consultant and has broad based experience in impurities and their control and analytical method development. Dr. Elder obtained his PhD in crystallography from the University of Edinburgh. Dr. Elder is a visiting professor at King’s College, London. He is a member of the British Pharmacopoeia. He is the immediate past chairman of JPAG (Joint Pharmaceutical Analysis Group). He is a member of the Editorial Advisory Board for the Journal of Pharmaceutical Sciences. He has published over 100 papers in international journals and has given 13 webinars and over 115 presentations at international symposia. He has co-edited a book on the Analytical Characterisation and Separation of Oligonucleotides and their Impurities (with George Okafo and Mike Webb) and a second on the ICH Quality Guidelines (with Andy Teasdale and Ray Nims).