Foster started his on-air career with the Seven Network, serving as a soccer analyst and principal commentator on their then pay TV sport channel, C7 Sport, as well as regularly appearing as a panellist on SBS' weekly soccer program On The Ball. He later joined SBS full-time, working with Les Murray and the Johnny Warren at the helm of SBS' hugely successful soccer broadcasts. He became known as "Fozz" or "Fozzy".
Following his retirement from professional soccer, Foster became the chief soccer analyst for the SBS show The World Game, from around 2002 until June 2020. He is remembered for his commentary during the World Cup Qualifier in November 2005 against Uruguay, and during the 2006 FIFA World Cup, Foster was part of the SBS commentary team from Germany.
He advocated for a more Spanish/South American style of play, as opposed to the constant use of the long ball in soccer, and was also known for his outspoken stance on the need for soccer in Australia to mature.
In 2007, Foster was invited to be the Australian representative to judge the Ballon d'Or, the highest award given to an individual soccer player.
Also in 2007, he was a coach for the team assembled by the SBS television show Nerds FC in their second season.
In June 2020, it was announced that Foster would be leaving SBS, after working for 18 years as a sports presenter. He joined Stan Sport in August 2020, in time to co-present, along with UK presenter Max Rushden, several big UEFA competitions: the Champions League the Europa League, and the Conference League.
Foster has been a strong advocate for players' rights, having served for five years on Professional Footballers Australia (PFA) Executive, as a Director of the PFA's commercial wing, PFAM (PFA Management), and formerly as Interim Chief Executive of the Australian Soccer Players' Association (PFA's former name). He is a life member of the PFA, and in 2016 was appointed interim chairman of the PFA.
Other roles include being an Ambassador for the Johan Cruyff Institute (since 2018, as of 2022) and a co-director/ board member of John Moriarty Football.
