Vermeulen joins RDFR with a wealth of television sales experience. Most recently, she was director of programme distribution, UK and Eire at the Walt Disney Company, where she worked across a wide portfolio of kids, prime-time series, news and reality formats.
Prior to this, Vermeulen headed up the kids' sales and international operations at Mational Geographic Kids Entertainment/NGTI, where she was responsible for sales and pre-sales worldwide.
Other roles have included territory manager for the UK, Ireland and German-speaking Europe at Entertainment Rights.
At RDF Rights, the new recruit will be heading up the RDF Kid's and Family television sales division.
Matthew Frank, MD of RDFR said: "Karen has a long and successful history in the kids' arena; she also brings with her a track record of securing co-production partners, something that is key to our sales division's business moving forward."
Karen Vermeulen added: "I am incredibly excited about joining RDF Rights, who has successfully built their commercial and creative eminence in the kids business.
"I look forward to working with their strong portfolio of kids and family programming and being part of its continued success."