They call all the time for my operations manager. They try to convince me that they know him or that it is urgent and need his cell number. They are telemarketers, and are rather rude at it. They claim the company name is percision, "the lighting guy/girl." I have even flat out told them, that they are not our lighting people, and they still call.

says he is with Precision Industrial and wants to talk to maintenance...obviously a sales call, but since they hung up on me, we will not be taking any calls from these people.

I have had calls from these guys before.  I think they changed their number or are using a different one.  These are the guys that send stuff and bills that you don't ask for.  Here is the BBB quote on them:
       "BBB has received a pattern of complaints concerning dissatisfaction with the business' services, specifically unauthorized and/or unordered merchandise being delivered, misleading selling practices, and difficulty in returning merchandise to the business."  They also received a D+ score.  I wouldn't mess with these people unless you want product and bills you didn't ask for.

No clue. They keep calling me too.