| Appointment | Rank | From | Until |
|---|---|---|---|
| Chief Secretary - New Zealand, Fiji, Tonga, and Samoa Territory | 1913 | (1916) | |
| Field Secretary - Australian Territory | (1916) | 1921 | |
| Chief Secretary - Australia Southern Territory | 1921 | November 1, 1923 | |
| Chief Secretary - Canada and Bermuda Territory | November 1, 2023 | March 14, 1926 |
In 1889, at the age of 21, Powley became an Officer and was sent as a Lieutenant to a hard-Scottish Corps where he had the depressing experience of closing the Corps and seeing his Captain go home ill. Other Corps followed in due course. In all he had eight field appointments, after which he served as Helper at four Divisional and Provincial Headquarters.
In 1896, he was appointed Private Secretary to the British Commander. Other important Staff appointments followed – Staff Secretary for the British National Headquarters, Private Secretary for British affairs to the General, the responsibility for the Staff Training College.
His next appointment was the General Secretary for the International Training Garrison.