Complex sentence: As Communications Manager, ultimately overseeing the station's growth to include staging popular music festivals under the Purple in the Park and Fierce Festival brands, Colm broadcast under the on-air name Mark Young.
Split into simpler sentences: As Communications Manager, Colm ultimately fostered the station's growth to include popular music festivals under the Purple in the Park and Fierce Festival brands. During his tenure at Purple Radio, Colm broadcast under the on-air name Mark Young.