Bell was announced in the new role on Wednesday shortly after it emerged that he had left Alpine, where he had been working on non-F1 projects.
Alonso worked with Bell through his first two stints at Renault, including his world championship-winning seasons in 2005 and 2006, when the Ulsterman was technical director.
When Alonso returned to the renamed Alpine team in 2021, Bell was again present in the Enstone camp as an advisor.
He has now taken up a newly-created role at an organisation that already had a strong technical structure in place.
“Always when more people come to the team, there is not really any disadvantage, to be honest,” said Alonso when asked by Autosport about the new arrival.
“There is always an advantage. And the problem is to convince everyone to work together as a team, and as a group.
“So that's the role also of Martin [Whitmarsh], and the role of Lawrence [Stroll] as a leader. I think we have a great technical group of people and great leadership as well. So step-by-step, hopefully, creating a bigger team."
Source: Autosport