Dan graduated from Liverpool University in 1987. After eighteen months in a mixed practice in Yorkshire, he began a residency in small animal surgery at the University of Liverpool. Dan gained an RCVS Certificate in Veterinary Radiology in 1990 and a Certificate in Small Animal Orthopaedics in 1991.
Dan moved to the University of Pennsylvania in 1991 as a Lecturer in Surgery and where he became Assistant Professor of Surgery in 1994. He became a diplomate of the American College of Veterinary Surgeons in 1999 and the European College of Veterinary Surgeons in 2000. He joined the Royal Veterinary College as a Lecturer in Soft Tissue Surgery in October 2000 and became a Senior Lecturer in 2003. He was awarded a Professorship in 2007. Dan is currently Director of the Cardiothoracic Surgery Programme at the RCV