Complex sentence: Nissen is an accomplished'cellist and double bass player, having played in the National Youth Orchestra, the Cambridge University Musical Society orchestra under Sir David Willcocks, and the Salomon Orchestra, one of London's finest amateur orchestras.
Split into simpler sentences: Nissen is an accomplished'cellist and double bass player. He has played in the National Youth Orchestra, the Cambridge University Musical Society orchestra under Sir David Willcocks, and the Salomon Orchestra, one of London's finest amateur orchestras.