In addition to his know-how of training theory, Derek is also a highly successful coach and athletics administrator. Beginning in Canada in the mid-1990s, he was first the Head Coach of the Kamloops Track and Field Club (where developed international athletes and medalists Shane Niemi, Gary Reed, and Dylan Armstrong, amongst others), before moving to Edmonton to work alongside Kevin Tyler as the Sport Science Manager at the Canadian Athletics Coaching Centre (CACC). Established as part of the legacy from the 2001 IAAF World Championships in Edmonton, Kevin and Derek together built the CACC into one of the premier coaching and training centers in the world. Focussing on coach education and training, application of sport science to track and field, and the overall development of the sport in Canada, the CACC was a hugely successful endeavor that led to both Kevin and Derek being recruited to high-level positions in the UK.
Derek moved across the Atlantic in 2009 to become the Centre Director of the Loughborough High Performance Centre (one of two in the UK – the other being in London, where Dan Pfaff was the Centre Director). Besides managing a group of coaches, administrators, and support staff, Derek coached a young group of throwers in the UK, including Sophie Hitchon, who under his tutelage won a World Junior Championship, broke the British Record in the hammer at 19 years old, and qualified for the Olympic Final in 2012 at the age of 21!
Since 2012 Derek has returned to Kamloops and started a small training group focusing on the hammer throw. In 2014 he guided Sultana Frizell to a Commonwealth and North American record, as well as a Commonwealth Games gold medal and also worked with Olympic hammer thrower Heather Steacy.
Through his coaching career, Derek has been named to 4 World Championship Teams, 2 Olympic Teams, the European Championships, European Team Championships, European under-23 championships, and many others.