Now boys, don't think a girl can't give good fashion advice, especially guys fashion advice
I work in Business and have spent my life dressing as a guy, eeek! So, I think a guy looks great in a nice suit, shirt, and if the office does it, then a nice smart tie. And of course nice polished black shoes. I don't think it looks the slightest bit feminine, in fact, I'm still presenting in guy mode at work and I'm trying my best to femme up my business attire. Short of me wearing a women's business suit, nothing's working for me. So I think you'll look great and very manly in business attir.
Oh, and congrats of the job, well done.