Hey everyone this achievement requires you to melee an opponent off the ship with
. I cannot say if this is do-able in most parts of the level but the drone hanger after the Thermal Vision section is by far the best/easiest place to do it.
I tend to jump over the stairwell railing on the left, run around the drones and into the shipping containers. From here you can camp their drop-in point untill the right opportunity presents itself.
Although melee attacks send enemies flying a fair distance try to lure them to be as close to the edge as possible.
Make sure when inside the container no-one flanks you and please check the video I made below if you're having problems.
Hope this helps!