Siamandouras started his
club career with the Greek club
Panellinios (2000–01), and he subsequently played with the following Greek clubs:
Panelefsiniakos (2001–02),
Maroussi (2003–05),
Nea East (2005–06),
Sporting (2006–07),
Iraklis (2007–08),
Peristeri (2008–09),
Aigaleo (2009–10), back to
Maroussi (2010–11),
AEK Athens (2011–13), and
Kymis (2013–15). ==National team career==