Swiss bank UBS enticed a key technology banker back, after a six-month stint at Wells Fargo.

UBS is hiring Paul McEwen as its head of technology services, «Reuters» reported. McEwen had previously overseen the Swiss bank's cloud services before leaving six months ago for Wells Fargo, which hired him as head of infrastructure.

He will be back at UBS next month, the newswire reported, and report to Mike Dargan (pictured below), who was recently elevated into UBS' top management.

Dargan 500

Dargan now oversees technology as well as UBS's group corporate services.  CEO Ralph Hamers has called the new job crucial in differentiating UBS.