The phrase "a new contributor of" is correct and usable in written English.
It can be used when referring to someone who is recently joining a group or project and is expected to provide input or contributions.
Example: "We are excited to welcome Sarah as a new contributor of innovative ideas to our team."
Alternatives: "a new member of" or "a fresh contributor to".
Newsweek announced that Karl Rove, the controversial architect of the rise and fall of the modern G.O.P., will join its ranks as a new contributor to balance the recent hire of blogger Markos Moulitsas.
Since being a new contributor can be intimidating, and new members of a wiki may have no idea what the wiki is about, they might want to look at help pages.
Dana Perino is a Fox News contributor and one of the rotating panel of co-hosts on that network's 5 PM show, "The Five".
We know that if Reid were Republican, the Hill would be flipped in a firestorm of rage, public protests would ensue, Republicans would be getting clowned as Klan caricatures and another powerful White guy would find himself bowing out in disgrace (only to end up as either a well-paid talk show host, a Fox News contributor, or the partner of a high-end lobbying firm).
(A New Yorker contributor, Adichie was one of the magazine's "20 Under 40" authors in 2010).
Keith Gessen, a New Yorker contributor and star literary critic of his generation, weighs in tomorrow.
Janet Malcolm, a New Yorker contributor since 1963, has provided years of commentary on subjects as varied as interior design, photography, murder trials, and psychiatry.
A Fox News contributor has offered a bizarre defense of Republican presidential candidate Ben Carson's assertion that the Holocaust was the result of Nazi gun control.
The anchors will sit in a brand new studio and host new segments, joined by a number of new contributors.
The decision was quickly overturned, and Planned Parenthood gained a new list of contributors.
