u/Hopeless-Shadow

So I (?M) recently ran into an issue surrounding a newly hired co-worker. The boss hired him after the -lets say the opposition- started making threats against the other departments of my Job. The opposition had previously tried to put us out of business but we put him out of business instead.

Anyway, in response to these threats the Boss hired a new coworker to try and help thwart any sabotage attempts. I already knew this guy (11-300+M) and personally do not like him. He's sabotaged my department before at my annual showcase and yes it was only once but most of my work is related to this annual event. He also makes fun of my accent and cares more about goofing around then doing work. AITJ if I refuse to work with him on these grounds?