Serving as Chief of the General Staff from 1954 to 1958, Wells' career culminated with his appointment as the first Chairman, Chiefs of Staff Committee, a position marking him as the professional head of the Australian Military.
Melayani sebagai Kepala Staf Umum 1954-1958, karier Wells memuncak dengan pengangkatannya sebagai Ketua pertama, Kepala Komite Staf, sebuah posisi yang menandai dia sebagai kepala profesional Militer Australia.