Tommy Troelsen played football for Denmark at the 1960 Roma Olympics. He was on the Danish national team from 1959-68 with 16 international caps at the senior level. Domestically Troelsen played from 1957-68 with Vejle Boldklub, helping win the Danish Championship and Danish Cup in 1958. Troelsen and Vejle repeated as Danish Cup Champions in 1959.
After retiring from football Troelsen became a television host of football games, hosting the Sportslørdag program every Saturday. He also hosted a talk show on Danish television.