Complex sentence: Picken started his career at Sydney FC playing in the youth team but moved to Newcastle Jets after then manager Richard Money signed him, whilst playing for the Jets Picken was a concreter for the few years he was there.
Split into simpler sentences: Picken started his career at Sydney FC playing in the youth team but moved to Newcastle Jets after then manager Richard Money signed him. Whilst playing for the Jets Picken was a concreter for the few years he was there.