Peter Nectario Tsekenis (born 4 August 1973) is an Australian former professional soccer player who played as a defender and the current coach of Marconi Stallions.
Born in Sydney, Tsekenis played at club level for St George, Sydney Olympic, Newcastle United and Belmore Hercules, before becoming player-manager of Bankstown City Lions.
He also participated at the 1996 Summer Olympics.
In 2011, Tsekenis returned to Sydney Olympic Football Club as coach of their first grade side. By April 2019 he was coaching Marconi Stallions.
He is of Greek descent.