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David Scott-Donelan (also known as DSD) has shared his extensive tracking knowledge by conducting hundreds of classes World-Wide over the last 50 years. Unsurpassed in operational and training experience he developed what is now known as Modern Combat Tracking which combines both “stone age and space age” components into a formidable and essential tool for both police, corrections and military applications. David is not only widely recognized as a master instructor within the tracking community at large, but also holds a place of esteem amongst his past students.     
While serving in the Rhodesian Army in the mid Sixties David received formal tracking training as a stake holder of the Tracker Combat Unit (TCU). The TCU had the unique mission of locating and following the tracks of Communist insurgents infiltrating the borders of Rhodesia and attack the civilian population.  During his 27 years military and police service in Southern Africa David (or DSD as he is known) served with the Rhodesian Special Air Service, Rhodesia Regiment, Tracker Combat Unit, British South African Police Reserve, Rhodesian Light Infantry, Selous Scouts, South African Special Forces and South West Africa Territorial Force. He immigrated to the USA in1989 after winning a place in the USA Immigration Lottery.​

In 1994 David, realizing a dire need in both police and military circles for tracking skills. he opened his first tracking school in the United States and never looked back. Guided by his passion for sharing the tracking skill set, his first company experienced rapid and significant growth under his tenure.  By emphasizing the value and tactical applications of visual tracking, David, with his unique man-tracking instructional style, found great interest, support and relevance among law enforcement and military personnel in the USA and beyond.  Following his entrepreneurial spirit and commitment to “make a difference and not the dollar,” David left his original school in 2009 and opened his second USA and International “SCOTT DONELAN TRACKING SCHOOL" in January 2010. He now conducts classes all over the USA and overseas.