Hoff, who will be based in London, will be working alongside Anthony Davies, regional creative director for Europe.
He will report into Nigel Vaz, the head of interactive for Europe.
Hoff joins Sapient from AMV, where he worked as digital creative director on brands such as Guinness, The Economist, Snickers and Sainsbury's.
He was part of the team behind the Guinness Tipping campaign and was also behind the latest Sainsbury's TV campaign with Jamie Oliver.