Barrie joined Fallon in January 2004 and leads the planning teams on the agency's BBC portfolio, including Radio 1, BBC 1Xtra and Glastonbury. She also has responsibility for Orange in the UK. She will retain responsibility for both accounts.
Laurence Green, the Fallon planning partner, said: "At Fallon, creative thinking is everyone's responsibility. The best planners are woven into the creative process. Rachel fundamentally understands this, and under her leadership the planning department will serve creativity as much as it masters strategy."
Barrie said: "Planning at Fallon is about using creativity as a competitive advantage. But it's the end result that counts: there's no set process and every planner will approach every problem in a different way. That's what I love about the job - making sure we never stand still."
Barrie began her career at Delaney Fletcher Bozell in 1997. In 2001, she moved to Partners BDDH, working on the Co-operative Group.
Crumpton joined McCann Erickson in July as its executive planning director. She was the first Fallon employee in 1998, joining the agency from BMP DDB.
Along with Abbott Mead Vickers BBDO and DFGW, Fallon is defending its position on the BBC roster as part of a statutory review. The broadcaster issued a tender for its £20 million above-the-line account last September. A decision is expected in October.