This had me at the first three paragraphs because it somewhat reminded me of the shenanigans that were once written here. Then it lost me a bit when I realized this story wasn't really about regaining his memories or meeting the Chaos Insurgency, or even about explaining why the facility was in shambles, and then had me again when he dies and turns into a ghost, because ghosts.
Also, he was wondering why he could still think, feel, and retain his personality despite being bodiless, and all of the other drivel that he recalled about the soul, the consciousness, and life after death. There was no room for thinking of those in his line of work.
You probably weren't feeling up to expanding on this, were you? ;p
The next few moments went by in a blur, and could be described in this aptly chaotic manner: He had possessed the man, and was now the pilot of his physical body. He jerked forward, hitting the bridge of his nose on the edge of the desk and feeling pain very sharply. He had a fit of epileptic movements, evident from the spastic shaking of his eyes and the fall of his chair and several writing implements from his table. He heard, or swore to have heard, clicking in his (new) brain, followed by a sensation of "twitching neurons" and "a war of conflicting electric potential" in his synapses. He found himself face-to-face with the man, screaming at him, only for the emotion to disappear and be replaced by an expression he could recognize himself with. He had killed the man, and the face he had just seen was his soul being supplanted with his own.
I'm reminded of your previous work, It Tingles, because of the detail you've put into these kinds of paragraphs. It reads like stream-of-consciousness from the perspective of someone in intense pain. It's a nice way of describing the complications of ghostly possession in your setting, and I wonder if it's a common power, or if the "ghost" is part of the character's anomaly, if he had any.
I don't know how this character will do in "Spidermen: The Reanimated Series" from that name alone… which… I guess… does it have to do with the Skirn? Because if so, that's positively something I'll wait to read, if for nothing else than to see what a piece with that title contains.