Guglielmo Arena (born 23 December 1973) is a Italian-Swiss football manager, who is the current head coach of Nepal.
In 2011, Arena was appointed manager of Singaporean side ÃÂtoile FC. In 2012, he was appointed manager of Algerian side CR Belouizdad. In 2018, he was appointed manager of Zambian side Buildcon FC. After that, he was appointed manager of Swiss side FC Conthey. In 2020, he was appointed manager of Moroccan side RC Oued Zem. On 2026 march he was appointed as head coach of Nepal Men's National Team