Liberopoulos began his career from the local club
Erani Filiatra alongside his cousin,
Nikos. In 1995 he joined
Kalamata where he made his debut in the
first division on 14 January 1996 against
Apollon Athens at
Rizoupoli. He spent a season at
Ethnikos Piraeus, but in 1998 he returned to Kalamata. On 9 August 2001 Liberopoulos was transferred to
AEK Athens alongside his teammate,
Stathis Kappos. In his first season at the club, he won the
Cup. On 22 August 2002 he was loaned to
La Louvière, but on 7 September his loan was terminated. During his spell at AEK, he failed to establish himself in the squad making only four league appearances. On 20 July 2004 his contract was terminated and Kappos signed for
Aris. At the club of
Thessaloniki, he emerged as their main goalkeeper for a season. In 2005 he moved to
Akratitos and in the following season he played for
Kastoria. Afterwards, Liberopoulos joined
Skoda Xanthi, where he played until 2013. He then moved to
Kallithea for two seasons and later he signed for
Ermionida. He finished his career at the club where he began football, Erani Filiatra in 2017. ==International career==