Rear Admiral William Hotsenpiller, OMM, CD was appointed as a Midshipman (E) (A/E) RCN(R) (With seniority dated 17/01/1955).
He served in HMCS Tecumseh 1955. (Transferred to RCN through Short Service Commission) 1955. He was appointed as an A/Sub-Lieutenant (E) (AE) (SSA) RCN (With seniority dated 01/07/1955).
He served in HMCS Shearwater and HMCS Magnificent for VX-10 / HU-21 / VS-881 and VF-871 Squadrons for Air Engineering Familiarization 1955.
He served in HMCS Cornwallis for 84th Officers' Divisional Course 1955. He was appointed as a Sub-Lieutenant (E) (AE) (SSA) RCN (With seniority dated 01/07/1955). He served in HMCS Niobe for Royal Navy Engineering College Plymouth UK for Specialist Course 1956. He was appointed as an A/Lieutenant (E) (AE) (SSA) RCN (With seniority dated 17/06/1957).
He served in HMCS Shearwater as Air Engineer Officer in VU-32 Squadron 1958, (Selected for permanent commission) 1958.
He was appointed as an A/Lieutenant (E) (A/E) RCN (With seniority dated 09/05/1958). He served in HMCS Shearwater for VU-32 Squadron as Air Engineering Officer. He was appointed as a Lieutenant (E) (A/E) RCN (With seniority dated 09/05/1958). He served in HMCS Bonaventure 1959. He served in HMCS Jonquiere as Engineering Officer and for Upper Deck Watchkeeping Training 1962. He was appointed as a Lieutenant-Commander (E) (A/E) RCN (With seniority dated 17/07/1964). He served in HMCS Shearwater as Station Facilities Officer and Acting BCEC 1964.
He served in CFB Toronto for Canadian Forces Staff College Course 1966, NDHQ as Career Manager 1967, Commander (MARE) 1969, CFB Esquimalt for Ship Repair Unit Esquimalt as Head of Engineering Department 1970. He served in NDHQ on Staff of Directorate of Personnel 1973. He was appointed as a Captain (MARE) (With seniority dated 01/07/1973). He served in CFB Halifax as Commanding Officer of Ship Repair Unit Atlantic 1976. He was appointed as a Commodore (CF) (With seniority dated 01/07/1978).
He served in CFB Borden as Base Commander 1978.
He served in NDHQ for Personnel Staff 1984. He was appointed as a Rear-Admiral 1986. he served in NDHQ as Chief Personnel Careers and Senior Appointments 1986. He was appointed as a Vice-Admiral 1988.
He served as NDHQ as Assistant Deputy Minister (Personnel) DND 1988. (He was retired 08/08/1989.)