EHS Brann was appointed due to its experience with customer loyalty, which is expected to form a major part of the forthcoming integrated marketing push for the credit card.
Sky Card rewards customers for purchases with Sky Points, which can then be redeemed against a range of rewards from Sky products and services to exclusive entertainment based experiences.
In May, EHS Brann created a major marketing drive to support the redesign of Tesco's reward card, the Tesco Clubcard.
Mike Spicer, group managing director of EHS Brann, said: "We know that people are looking for more from their credit cards - that's why the rewards sector is growing. And this new unique proposition will give Sky customers more of what they love about Sky -- entertainment -- while driving customer loyalty and the success of the Sky Card brand."
Chris Bull, head of partnership products at Sky, said: "EHS Brann has been appointed to the integrated marketing account for Sky Card due to its impressive strategic thinking on loyalty marketing. We look forward to working with them on the campaign planned to kick off later in the year."