Don is executive chairman at Disc Therapeutics and was formerly CEO of Nimbus Therapeutics. He previously spent 25 years at Merck where he held various strategic, leadership and operational roles in diverse therapeutic areas. Don began his pharma-therapeutics career in 1988 as a bench scientist at the Merck-Frosst Centre for Therapeutic Research in Montreal and advanced through various positions of increasing responsibility, most recently as Worldwide Discovery Head for Bone, Respiratory, Immunology and Endocrine disorders. Don has co-authored over 150 scientific publications and is internationally-recognized for his contributions to the field of apoptotic cell death. He received his Ph.D. in Biochemistry from the University of Western Ontario, and trained as a Medical Research Council post-doctoral fellow at the University of Munich in Germany.