Not really a solution. However theres two ways of getting this;
1 - You can either go on the Outer Rim DLC on the bottom left hand corner on the multiplayer and it will search for games on that DLC. This will send you into a game rotation which includes extraction, heroes vs villains, blast, cargo and droid run. This is the longer way around getting this achievement.
2 - On Outer Rim DLC on the bottom left hand corner on the multiplayer it gives you a choice to select mode by pressing (X). Here you can go into an extraction mode straight away but note you will play two games of extraction (Attack and Defend) then it will move on to the next game rotation as previously stated in solution 1. All you have to do is quit out and repeat solution 2 till you get 10 wins. (Note you will not always play 2 games of extraction it all depends on when joining the game).
Also you don't have to be in the game at the start for it to count if you win.