Complex sentence: He spent six years with NWR before moving to Highland Radio, an independent radio station based in Letterkenny, County Donegal.A year later he moved to work for TV3, he left to work for Sky News.
Split into simpler sentences: He spent six years with NWR before moving to Highland Radio, an independent radio station based in Letterkenny, County Donegal. He workedone year at Highland before leaving moving to work for TV3, he left to work for Sky News.