You must be at least a Rank 15 to unlock the Survival missions. These missions are essentially a "horde" mode where you will need to fend off against ten waves of enemies. After each wave, you are given a short amount of time to restock on ammo, health, and body armor that is scattered throughout the map. Each wave also becomes progressively harder; enemies will have stronger weapons, attack in larger numbers, spawn in SUV's, or even helicopters.
Once you have reached the required rank mentioned above, Ron will give you a call and fill you in on these missions. After the phone call, open up your world map and find the closest Survival Job which is marked by a shield and cross emblem. At first, there are only three Survival maps you can play on. These are Boneyard, Sandy Survival and Industrial Plant. Railyard Survival will unlock once you have reached Rank 20, and Processed at Rank 25.
Out of the three starting maps, Boneyard would be the best choice. In the middle of this map ,there are two large hangers that have a small fenced off area in between. The fenced area provides excellent cover as enemies will not be able to shoot through the fence, even though you are. If you choose this method, make sure to have at least two other players with you; one will need to cover the doorway into the fenced area, and the other two should cover either side of the hanger by shooting the enemies through the fence.
Make sure to follow these four simple tips and you should be able to clear all 10 waves with less trouble:
Make sure you are playing with in full 4 player lobby
Always use cover!
Stock up on ammo, health, and body armor between each wave
Communication is KEY - make sure all your teammates have mics
Once you have successfully completed all ten waves on any map, the achievement will unlock! Take note that completing all ten waves is also a necessary requirement for the Numero Uno achievement. You will also unlock a Platinum Award upon completing all ten waves.