When you do get him make sure you have room and assign him to r&d. I had a problem with the noise suppression specialist. I kept rescuing him and he would disappear. My staff and waiting room was completely full and his stats were worse than anyone I had so he was immediately dismissed. Lol frustrating. I think I rescued him 5 times before I figured it out.
Lol fucking stupid. I'd feel like the game was incomplete if I hadn't played it. My psychosis wouldn't allow me to play TPP without playing Ground Zeroes. I actually want to go back and play it. I loved the Ground Zeroes mission.