The phrase "a moderator at a" is correct and usable in written English.
It can be used when referring to someone who moderates discussions or activities in a specific context, such as a forum, event, or organization.
Example: "She was appointed as a moderator at a popular online gaming community."
Alternatives: "a facilitator in a" or "an overseer for a".
(He recently told a moderator at a Cannes Film Festival news conference to address him as "your Adequacy").
During his speech, Trump called Fox News anchor Megyn Kelly biased and said she should not be a moderator at a Fox-hosted Republican debate in Des Moines on Thursday.
Science reporter Jon Cohen will be a moderator at a swine flu symposium at the Council on Foreign Relations on Friday.
But this past weekend, Scarborough served as a moderator at a Republican fundraiser in New Hampshire.
Karen Ahn, who writes Mighty Big TV's wrap-up of MTV's "Real World" and moderates the discussion boards pertaining to the show, used to be a moderator at another Web site.
"This is a rebuttal?" he asked a moderator at one point.
A few days later, as a moderator at the first Republican primary debate, Kelly asked Trump about past comments he had made disparaging women.
(Full disclosure: This reporter served as a moderator at the event). A few weeks later, the Blind Pig, an Asheville supper club, hosted Milton and five other chefs for a dinner called Appalachian Storytellers.
Magnus Bosse, a watch connoisseur who is a moderator at PuristsPro.com, a leading online watch community, said some participating brands seem to view the event as a form of Olympic games for the industry, in which they compete not only for the highest price but also for the most exceptional and extraordinary creation.
Tommy Hoyer, a moderator at the site, said Mr. Pena was a generous contributor to the forum's upkeep and activities, including last year's Christmas toy drive, in which he was the single largest contributor.
Yesterday, however, someone claiming to be a moderator at the homebrew coding forum PSX-Scene provided an alternative explanation.
