[3][4][5] In 1922, he was appointed for assigning his duty as a flight trainee at Naval Air Station Pensacola.

Later, in 1950, admiral Gardner was also appointed promoted to the commander for Carrier Division Seven.

He was also serving as the member of National Advisory Committee for Aeronautics (NACA) from 1952 to 1953.

[8] The President of United States of that time, conferred numerous military decorations upon Gardner in recognition of his contributions.

His funeral was held on 27 August at U.S. navy base Naval Air Station Pensacola, Warrington.