I need a reputation management expert. That's what I need!
Someone who can terminate few of the mentions I find on search engines when I Google or Bing a certain individual name.
You need to think about what you're asking here. You're asking for somebody to SEO a multitude of sites, the sites around the "few mentions" you're referring to, to the extent that it wiped them off the 1st page (at least). And you want it in a week...
There are plenty of companies and individuals out there (and on here) that are capable of delivering the end result you want, but anybody you speak to that's legit will tell you your expectations in terms of time frame are unrealistic.