Kennedy was a member of the Irish team that won the silver medals of 2017 Rugby Europe Sevens Grand Prix Series.

He was named as a member of the HSBC Dream Team, as well as being crowned the Top Try Scorer for the 2021–22 World Rugby Sevens Series.

Kennedy plays his club rugby with St. Mary's College with whom he won the All-Ireland League 1B title in 2017.

Kennedy competed for Ireland at the 2022 Rugby World Cup Sevens in Cape Town.

[6][7] Kennedy's father, also named Terry, was an Irish rugby union international, winning 13 caps between 1978 and 1981.