Brian Cosmas Sierakowski (born 1 November 1945) is a lawyer and former Australian rules footballer.

Family

His son, David Sierakowski, also played for St Kilda and the West Coast Eagles in the AFL and his nephew, Will Sierakowski, played for Hawthorn & North Melbourne. His brother in law is Richmond team of the century member Michael Green. His grand-nephew is current GWS player Tom Green.

Football

He played as a ruckman and defender for the St Kilda Football Club playing 75 games and kicking two goals from 1964 to 1968. He played in the 1966 premiership side and was named as one of the best players in the Grand Final. Later, he played for Subiaco and represented Western Australia. He has contributed 40 years of honorary service to the Western Australian Football Commission is his role as arbitrator, appeals tribunal member and Chairman of Community football.

Shark attack

He survived a shark attack in 1997 off Cottesloe. His damaged surf ski 'Extract of Poland' adorns the ceiling of the well-known Cicerello's Fish 'n' Chips in Fremantle.