She joined CBC's The Journal when it began in 1982, becoming its senior foreign correspondent, focusing on stories in the Mideast, but also reporting from China, Nicaragua, Northern Ireland, Africa, Bhopal and elsewhere.

She has addressed the United Nations' World Television Conference, the CBC's Board of Directors, the North American Broadcasters Association and the World Conference on the Arts, in addition to many major corporate clients including Perigee, Viacom, Honda, and Heenan Blaikie.

She is past chair of both the Academy of Canadian Cinema and Television and the Cultural Industries Council of Ontario.

And she has served on the boards of TVOntario, the Calmeadow Foundation, Toronto Women in Film and Television, ACTRA, I.C.E.

Medina has also played a television reporter in the films Zero Patience, Unfinished Business, and Dangerous Offender: The Marlene Moore Story.