Under the agreement, 888sport branding will feature on the front of players’ shirts, as well as on various surfaces in and around the team’s Tallaght Stadium home.
Confirmation of the deal comes ahead of the start of the 2021 League of Ireland Premier Division, which is due to begin on 19 March. Shamrock Rovers finished as champions of the previous campaign, going the entire league season unbeaten.
888 already has a presence in the Irish capital of Dublin, with its office, located eight miles from the Tallaght Stadium, employing 140 people.
“The team at 888sport share our desire for success and we look forward to working with them to build a strong relationship over the next two seasons,” Shamrock Rovers chairman Ciarán Medlar said.
888 vice president and head of 888sport, Kieran Spellman, added: “The club enjoyed a fantastic season last year and is back fighting for a place in the Champions League for the first time in a decade.
“As a sizable employer in Dublin, committed to Dublin and to the Irish market, we are very much looking forward to playing our part in supporting our local team.”