Major General Sir William George Gentry, was a professional soldier in the New Zealand Military Forces who served during the Second World War. He was Chief of the General Staff of the New Zealand Military Forces from 1952 to 1955.

Chief of Army (CA) is the effective commander of the New Zealand Army, responsible to the Chief of Defence Force (CDF) for raising, training and sustaining those forces necessary to meet agreed government outputs. The CA acts as principal advisor to the CDF on Army matters, though for operations the Army's combat units fall under the command of the Land Component Commander, Joint Forces New Zealand. The rank associated with the position is major general, and CAs are generally appointed on a three-year term.