Derek James Armstrong (born 16 March 1939) is an English former professional footballer and current Director of Coaching of the San Diego Nomads.
He was there for 5 seasons and left after winning the Northern Premier League Cup beating Wigan Athletic in the semi-final, and Macclesfield Town in the final.
In the United States, he became an assistant coach with Columbus Magic in Ohio in 1980, before moving to Nomads Soccer Club in La Jolla California in 1981.
He became the first paid youth soccer coach in the United States when he joined the staff of the La Jolla Nomads.
[1] In 2001 the Nomads were asked to manage the San Diego Flash franchise in the A-league by the league, the side under Armstrong reaching the play-offs.
[1] He also coached the UC San Diego (UCSD) men's soccer team from 1983 to 2007, during which time the Tritons won three national titles.