John Keister (born 11 November 1970) is a former footballer and coach. Although born in England he has gained international caps for Sierra Leone. He is currently head coach of the Sierra Leone national team.
Keister started his career at Sierra Leone side Tigres in 1992 before moving to England in 1993. Since living in England he has played for Walsall, Chester City, Shrewsbury Town, Stevenage Borough, Margate and Dover Athletic where he was captain before returning to previous club Margate on a free transfer in September 2009. However, in January 2010 he was suspended from all his contract duties for a period of 14 days whilst his club investigated allegations against him of misconduct.
Whilst playing for non-league club Margate he gained 2 international caps for Sierra Leone, he played in two World Cup qualifying games against Nigeria and Morocco, making him the first player from the club to receive international recognition whilst playing for them.
Keister was player/assistant manager at the club but left in February 2011.
Following a spell at FC Johansen, he was appointed as manager of the Sierra Leone national team in 2017. After leaving the post in 2019, he was reappointed in August 2020