Yes it is. The security office door is maybe 30 meters away, along the wall that Kevin is currently backed into.
This is an area with a fair amount of traffic from CTI employees, so wrapping up whatever you're going to do with these workers is a good idea. I'd like to point out that knocking them unconscious while leaving them in the hallway will be a dead giveaway to whoever happens to walk into this area next. That's not necessarily a problem, because you can probably fight your way out of anything CTI throws at you, but if the goal is to stay quiet for as long as possible, you don't want to knock these goons out and leave them there.
Also, panic buttons are not super-high tech. It's just not likely that some regular guy in a business suit would have one. He would, however, have a comlink. Most people in America would. They're as ubiquitous as smartphones are in the real world. The tech level we're working with in this game is "mostly the same as 2010-2020 real life tech, except that people are starting to access the internet in a cooler, more immersive way"