I pluck mine. A few times I've gotten a little overzealous with the tweezers. Have to give them a couple weeks to grow in.

Plucking can be really tricky, especially to get both sides balanced. A lot of times you can wind up whittling your eyebrows down really thin before you get them right, except then your eyebrows are too thin.
Anyway, my Mum noticed the last time I saw her. She suggested I just go get them done at a salon. I was really shocked. I never thought in a million years my Mother would suggest something like that. I was expecting "leave them alone, you're a boy". Instead I got a referral.

Anyway, Mum said that the salon she went to had guys in it all the time--businessmen and people like that. I don't think it's as uncommon as it used to be, maybe even just 20 years ago or so.
I think businesses don't care why you want your eyebrows done, they just want your business. If the person asks, tell them your unibrow negatively impacts your sales figures.
I vote for you to go to a salon (assuming that you live in a place where you won't get beat up for going to a salon). The bonus about getting them done professionally is that you'll get them done right the first time. It'll be less noticeable, more like just getting cleaned up. Sort of like getting your hair trimmed or something.