Jago joins Tesco from Bibendum Wines where he worked for 16 years. During his time there he worked in a number of positions, most recently as joint MD. He left on March 1 this year following a management reshuffle.
He replaces Mark Murphy who leaves the role to develop Tesco's operations in Japan where it has 100 stores.
A spokeswoman for Tesco said: "Dan's experience and extensive knowledge will help us to strengthen our already successful range, ensuring that we offer our customers the best-quality range at the best price. A spokeswoman for Wines of South Africa added: "We are delighted Dan has this new position. It is refreshing to have someone at the helm who has a genuine understanding of supply-side challenges."