Transitioning from athlete to coach, Selwyn embarked on a coaching career that took him to esteemed institutions such as Amherst College and MIT. At MIT, he played a crucial role in guiding both the men's and women's programs to multiple championships, fostering the development of NCAA All-Americans and qualifiers along the way.

Equipped with a Bachelor of Arts degree in Communication from UConn and a Master of Science in Sport Administration from Arkansas State University, Selwyn combines his academic knowledge with his coaching expertise to nurture the next generation of track and field stars. His commitment to continuous learning is evident through his various coaching certifications, including USATF Level I, USTFCCCA Sprint/Hurdle/Relay Specialist, USTFCCCA Strength and Conditioning, and USA Weightlifting Certification.