Really you can change your name for whatever reason you want, and there isn't even a process. You just start introducing yourself as that new name. Of course you have to be careful which name you use on which form (legal name goes on the I-9, chosen name goes on the resume, occasionally you get the opportunity to fill out the 'other aliases' field, etc), but otherwise there is zero hassle and so long as there is not an intent to defraud, you are in the clear.
Almost every member of my immediate family has casually done this at least once with no problem (it's kind of a family tradition it seems..). The name on my credit cards, the name I am known by professionally, and the name my parents know me by are all different. They share similar derivation yes, if you know one of them you probably would not bat an eye when another came up, but they are absolutely sufficiently different to isolate online reputations.
