Can I be held personally responsible or would my company be liable?

I have a hypothetical scenario that I would like to ask to be on the safe side. Let's say I work for a staffing agency (a company that helps others find employment). Let's say I have 2 associates (people looking for work) in the office at the same time. We will call them associate A and B. Let's say I have associate A's social security card sitting on my desk when I bring associate B back to my office to finish paperwork. I do not realize that I have associate A's social security card set in a place where associate B can clearly see it. I step out of my office for less than 15 seconds to grab associate B's drink from the front desk. Let's say, still hypothetical, associate B was able to document associate A's social security number in some way (memorization, writing on phone, taking a picture, etc), and is eventually caught with this information. And let's say that associate B tells that he was able to get the information because I left it out on the desk for anyone to see. Would I be