Capgemini will maintain and transform the whole IT infrastructure at SHL and provide support for about 1,000 desktop users at 35 locations across the Americas, Europe, Africa and Asia Pacific.
The transition, which begins immediately, involves the transfer of IT from three datacentres in the US and Europe to a single Capgemini secure datacentre located in Bristol.
User and technical support will be based at Capgemini service centres in Katowice, Poland and Mumbai, India respectively, and back-up support will be provided from Rotherham, south Yorkshire.
It is expected that about 20 SHL IT staff will transfer to Capgemini under TUPE.
Andy Ross, chief information and technology officer at SHL, said, "Working with Capgemini will help us meet the challenging targets we have for growth, service and cost effectiveness.
"Their solution gives the flexibility SHL needs at a time of significant change, and will help us deliver the high service levels our customers expect from us."