Complex sentence: He has over 11 years performing live improvisational comedy, national on-camera television commercials, and has been a writer & producer of humorous radio commercials for Sixty Second Airborne, and freelance humor writer & voice for one of the largest radio stations in the US.
Split into simpler sentences: He has over 11 years performing live improvisational comedy, national on-camera television commercials. And has been writer & producer of humrous radio commercials for Sixty Second Airborne, and freelance humor writer & voice for one of the largest radio stations in the US.