I just started working at a company about two months back fresh out of graduate school. There is one ex-colleague back in the graduate school who’s striving to land a job. I’d be more than happy to provide help in the process if one is my friend or at least a neutral acquaintance who maintains an amicable relationship with me. But this ex-colleague made my grad life quite miserable by throwing me under the bus several times. He also affected a couple of other colleagues of mine. I maintained strong, meaningful relationships with my advisor, other colleagues in the lab and outside so it helped me go through those years.
Now that I am out of grad school, I feel much better mentally and don’t want to cross paths with him by any means. So, here is the problem. I’m working at a top-level company that a lot of grad students in my (and his) field want to work at. He’ll probably try to apply here again. Given the size of this company, we are highly unlikely to work together even if he somehow gets a job here. But I think there is quite a high chance that we might somehow interact through company networking events or whatnot. I absolutely do not want to have him in my life anymore.
My question is would it be okay to tell my hiring manager that I do not really want to be around him if he ever applies in the future so somehow he could communicate with other hiring managers to not let him in?
Thank you all for providing honest feedback. As someone mentioned, I’m pretty new to this professional world. Grad school is kind of in the gray zone. I will not worry over the probability and give not too much power to him over my own life. Easier said than done. Having said that, I’m capable and once I’m determined I’m a go-getter. If he ever somehow gets a job here and is placed into my division (most likely if he’s offered a job), I will start planning some solid action plans. To be clear, I don’t mind working with people I don’t click with or dislike. I have quite a bit of experience and learned a very good lesson and applied it, resulting in successful collaborations and even developing friendship. These people weren’t bad nor toxic. They did not try to harm me. However, He’s just “toxic”. Hypothetically he gets into my division and somehow we start doing some collaboration. Hopefully by then I have thick enough skin to deal with his presence, remain nonchalant about our past, and even become super agile to detect any potential emerging back-stabbing plans. If not, I will just apply to a different company, not transferring within the company. Some might think that it’s too much but I care about my mental sanity. Dealing with a narcissist wasn’t fun.