since then, foster has played in all but two of papua new guinea's senior international matches: at the 2012 ofc nations cup, he started in all three of the nation's fixtures before their group stage elimination. in 2016, a busy year for the country, he started nine and was subbed on in the tenth of ten fixtures for the national team, including the five which saw them finish as 2016 ofc nations cup runners-up, having scored one of the goals in the crucial semi-final against the solomon islands. he played in all four of the side's qualifiers for the 2018 fifa world cup, and all but one of the country's five fixtures at the 2019 pacific games.