Douglas Rivlin (GrayRiv, ForumDriv)
While at the NIF and possibly while working for Gutierrez, Rivlin used the screen names GrayRiv and ForumDriv at various social media sites to post propaganda supportive of massive and/or illegal immigration. His accounts included: twitter dot com/grayriv, digg.com/users/ForumDriv/history, and digg.com/users/GrayRiv/history. In all the posts I saw he didn't indicate his real name or who he worked for. I only discovered his name and affiliation after a 2/25/10 post at newsjunkiepost.com.
I've repeatedly asked Rivlin on Twitter (@douglasrivlin) if he ever disclosed who he worked for, and Rivlin has repeatedly ignored those requests.