Colin J. Gillespie (born 11 May 1941) is a writer, physicist, lawyer and strategic analyst. He is the author of some 30 scientific research publications in quantum physics, biophysics, neurophysiology and radiation biology. He has also written on social planning, class actions, aboriginal law, environmental management and indigenous constitutions. He has 40 years of experience as a strategic analyst for business and aboriginal clients. He is an avid traveller, having spent time in more than 50 countries in all seven continents.