Arcelli assumed his current role in March 2023. In October 2023, ACWA Power achieved financial closure for 10 key projects worth over $14 billion in 12 months, the largest in the company’s history. The projects include the $8.5 billion NEOM Green Hydrogen project, the world’s largest utility-scale green hydrogen production facility under construction in Saudi Arabia. Before joining ACWA Power, Arcelli held several leadership positions at Enel Trade, Enel's North American operations, and EP New Energy.