Complex sentence: After that he became commanding officer of the amphibious transport dock in late 2010, Assistant Chief of Staff, Operations (Maritime Capability) at the Ministry of Defence in September 2012 and Assistant Chief of the Naval Staff (Ships and Submarines) in October 2014.
Split into simpler sentences: After that he became commanding officer of the amphibious transport dock in late 2010. Burton was appointed Assistant Chief of Staff, Operations (Maritime Capability) at the Ministry of Defence in September 2012 and Assistant Chief of the Naval Staff (Ships and Submarines) in October 2014.