For some context, I used to work with the Wycombe doctor, and we borrowed the team's kit occasionally, under some deal with the kit man. Admittedly, this was a while back, but no doubt still rings true.
Apparently, said kit man was 'much loved', a 'nice guy' and 'the soul of the club'.
I think it's pretty much the job description for what is probably not a well paid job.
And I imagine it extends way beyond looking after kit. Although that is, let's be honest, quite a responsible job - remember the odd time when some team's turned up with the wrong kit? It hits the national news (think it happened to one of the Sheffield teams not so long ago).