I accepted a great job with a consulting firm. The first client I am supposed to work with turns out to be a company I interviewed with a few months ago and got turned down. This wouldn't be so concerning were it not for these circumstances. 1. The client is extremely important ($) to the company and to the person I report to. 2. The executive that hired my company is the person that I interviewed with and subsequently turned me down. (No clear reason, my background was relevant so I suspect it was more of a personal decision). Given the circumstances I am not sure how to inform my boss and then how to handle the first day at the client where I will inevitably encounter the hiring manager. I obviously need to let my boss know before hand so he isn't side-swiped but I don't want to make a big deal out of it to the point he is worried. As far as the client, I'm not sure what to say in this awkward situation (nice to see you again?) I am somewhat apprehensive since I need/want this job. My biggest fear is we go in to the client and they simply pull my boss aside and inform them they don't want me on the project. Would appreciate any suggestions or sage wisdom on what to say to my boss and the client to smooth out this rather prickly predicament.