Despite being used mostly as the third-choice goalkeeper, behind Georgios Mitseas and Vangelis Chosadas, Sifakis rose to the occasion when he was called-up by coach Eugène Gerards to defend OFI's goal during the 1986–87 Greek Cup Final, in which he warded off two shots during the penalty shootout, for which his club claimed their first ever major trophy.
[1][2] After leaving OFI in 1992, Sifakis moved to fellow Alpha Ethniki side Pierikos, where he suffered relegation at the end of the season.
[3] Still in his playing years with Agios Nikolaos, Sifakis served as interim coach for the club during the final match-day of the 1996−97 Gamma Ethniki, after multiple managerial changes for the season.
In September 2006, Sifakis returned to Niki Volos and the Beta Ethniki, but unsuccessful results and administrative problems led him to resign in December 2006.
Sifakis then briefly returned to the Beta Ethniki, first by taking over Egaleo, where he was sacked after failing to improve their position on the League Table.
[9] He since has moved to manage clubs in lower regional and national divisions, including Antagoras Kos,[10] Rouvas, whom he promoted to the Gamma Ethniki for the first time in their history,[3] P.A.O.