No, why?
Unless you want to bulk up and look aesthetically pleasing (not everyone shares this taste), kick boxing and martial arts training in general are better and faster way to achieve your goals (to become stronger). You'll probably end up in the gym anyway, but you won't be slacking while pumping iron. That's something they teach you during martial arts courses, no fooling around. In the gym, unless you pay big money for personal trainer, you are on your own.
Downside of martial arts training is that it can be quite physically intensive. Could be a problem after long day in the office.
Join some martial arts club of your choosing, go to few trainings and see how it goes. Maybe it's just the thing for you. If not, just go to the gym instead.