I don't think that's fair. I share some of your other criticisms, especially about giving this potential con-artist a platform, but not this one. People should be able to engage in activities outside of the organizations they work for.
Nobody said otherwise. The reality, however, is that if your job is Communications and Outreach Coordinator for an organization that promotes skepticism and you, in fact, reach out and communicate to people about skepticism along with another member of the organization by interviewing somebody who has inquired about being tested by your organization and who was tested by a sister organization and passing that test means this persona is automatically qualified to take your test and then come to your organization's website to defend said interview, you're representing that organization.
We can argue until the cows come home where his "official" duties end and his "personal" choices begin. When he's doing an activity that would clearly fall within the expected job duties, the perception is going to be that he's representing the organization. I would say that most people in his position wouldn't try to split hairs considering the antagonistic relationship with the New Age community. At the very least there should be prominent disclaimers explaining his position (same for Alison). Absent that, the logical conclusion is that he's representing the JREF.
But even with disclaimers, his public statements about skepticism are going to reflect on the JREF whether he likes it or not. That's just how life works. It's silly to pretend otherwise.