Ms. Pennefather was a former Vice President of the Singapore National Olympic Council (SNOC) and former President of the Singapore Hockey Federation as well as a consultant in sports law.
A former national hockey player, she became the first woman to be elected as Vice President of Singapore NOC in 2002, a position she held until she stepped down in 2018.
As a player, Annabel captained the national team and played for Girls Sports Club and Singapore Cricket Club.
The Singapore Council of Women's Organisations (SCWO) said Ms. Pennefather was a "pioneering sports administrator".
She represented Singapore in 1964 and would go on to play for the country for the next 15 years, until 1979.
She served as Chef de Mission for Singapore at the 2004 Olympics, the Commonwealth Games in 2002 and 2010, the 2006 Asian Games and the 2013 SEA Games.