
Bagalue takes over from Coltman, who left on Friday (13 September) after three years in the role to join Google where she will be an industry manager.
As head of sales, Bagalue will run Jazz FM's in-house sales and sponsorship team of 10 executives.
She said: "Jazz FM is a brand that I sold on behalf of when I started my radio career in 2000 and I'm delighted to progress my career with such a commercially unique station."
Major sponsors of Jazz FM include the Financial Times, Taylor's Port, Aberdeen Asset Management, St Regis Hotels and Mishcon de Reya solicitors.