Career
As a manager, Manikas was most recently in charge of Ethnikos Piraeus. Manikas was announced as Ethnikos manager on 6 June 2008, but he officially resigned on 10 October 2008, after just four weeks of the Beta Ethniki 2009-2009 season. As a player, Manikas was a goalkeeper.
He spent the majority of his career with Panionios, but also played for Levadiakos, Ethnikos Piraeus, and Kallithea.
During his career Manikas earned 2 caps for Greece. He made his debut in a friendly against Romania on 11 March 1987.