Noval has put pen to paper on a one-year extension while Hernandez has signed for a further three seasons.
The pair have supported Contador for several years, originally at Astana, before all three made the move to Saxo-Bank for the start of the 2011 season.
"Jesus and Benjamin have been very important in our win in the Vuelta, because of their dedication and loyalty towards Alberto and the team," team manager Bjarne Riis said.
"Benjamin is the experienced and hardworking guy, who protects Alberto in the peloton, and Jesus is not only an asset on the climbs, but also a training companion of Alberto.
"At the same time both of them are great personalities to work with, so it was natural to renew their contracts."