The fact that a Glock striker is not fully-cocked by the action of the slide, and is only completed by pulling the trigger, is why some entities have deemed Glocks to be “double-action-only.” Many other striker-fired pistols have strikers that ARE fully-cocked by the movement of the slide, so that the only resistance to the trigger pull is a spring. So, a Glock is probably a “safe” choice, but, if this is a try-the-job before committing to a weapon, why not wait and see what the folks on the ground are actually using?
Regarding “limp-wrist” malfunctions, I have ulnar nerve issues in my right arm and hand, that are worse on occasions, and during such occasions, have managed to limp-wrist badly enough to cause malfunctions in a SIG P229 and even a full-sized, though tightly-fitted 1911, but, not yet, with a Glock G17 or G19. Notably, I have far more rounds through G17 pistols, than the G19, and traded-away my G19 pistols in 2020. (The “heel” of a G19 grip is uniquely shaped to act as a torture device for the arthritis at the base of my right hand, and in my right wrist. I favor Glocks that have either full-sized, (G17-sized) grips, or are “baby” Glocks, and I mostly shoot the “babies” left-handed.)
So, Glocks are not as overly susceptible to limp-wrist malfunctions as some folks say, but, on the other hand, I do generally wear a revolver as my usual daily primary carry gun, with an S&W Model 64 snub-length gun being the most-carried. I still consider my right hand to be my “weapon hand.” Even though I worked 33+ years of night-shift street patrol for Houston PD, in Texas, I feel generally comfortably carrying a six-shot, medium-frame revolver as my primary handgun, for personal defense, in retirement, living in a small city in the greater Houston area.
So, would I rather use a revolver, or a Glock 17, for working a security post? I did work “extra jobs,” which were security details, during the time I was a police officer, so, do have that, as a point of reference. For defending myself, I believe I would be comfortable, with either weapon. I am more consistently accurate with a Ruger GP100, or S&W K-Frame or L-Frame, than anything else I have tried. A Glock holds more ammo, but is not going to enable me to be quite as accurate. So, unless prohibited by policy, I will simply say that I would simply carry one of each.
Choose that which works best, for you. Try to find a paid instructor, who will let you try both autos and revolvers.