 McEwen is President of Western Clinical Engineering Ltd., a biomedical engineering research and development company and he is a director of Delfi Medical Innovations Inc., a company he founded to commercialize some results of that research and development.He is also an adjunct professor in the School of Biomedical Engineering, in the Department of Orthopaedics and in the Department of Electrical and Computer Engineering at the University of British Columbia.In 2020, to recognize his invention of automatic tourniquets for surgery and other applications he was inducted to the U.S. National Inventors Hall of Fame, joining others including Thomas Edison, Alexander Graham Bell, the Wright brothers, Banting and Best, Nikola Tesla and Steve Jobs.