Guglielmo Arena (born 23 December 1973) is a Swiss football manager.

[1][2][3] In 2011, Arena was appointed manager of Singaporean side Étoile FC.

[4][5] In 2012, he was appointed manager of Algerian side CR Belouizdad.

[8][9] After that, he was appointed manager of Swiss side FC Conthey.

[10] In 2020, he was appointed manager of Moroccan side RC Oued Zem.