During his three year term as British Columbia coach from 1975 to 1977, his teams faced Japan, Barbarians, New South Wales Country, and England Under 23 and they were national inter-provincial champions (Carling Bowl) in the same years. In 1976, Briggs was the coach of British Columbia's centenary tour of England and Wales. On two of JBAA's tours, the club won the Windsor Borderers Tournament during its cross Canada tour in 1976 and the prestigious Monterey (California) National Invitational Tournament in 1980. Briggs was elevated to coach the Canadian national team in 1983 for its home matches against Italy and for its tour of England.
Throughout this time, he taught and coached at the secondary school level and in the spring of 1977 and 1978 his Victoria High School team was provincial champion. Players and coaches at the school, club, sub-union, provincial and club levels were quick to recognize Tillman Briggs' shrewdness and attention to detail in his coaching style and were always willing to lend support.
As the leading motivational force of the JBAA dynasty in the 1970's and early 1980's few, if any, match the level of success, respect and camaraderie Briggs built in his extraordinary coaching career.