[1] Hulbert was the Commissioner of Docks and the Director of the Port of New York City starting in 1918.

[3][4] He served as the acting Mayor of New York City during the long illness of John Francis Hylan.

[1] He served as President of the Boston, Cape Cod and New York Canal Company.

[1][2] Hulbert was ousted from the Presidency of the Board after he accepted an honorary position as a member of the Finger Lakes Park Commission that was offered by New York Governor Al Smith.

In a decision by New York State Supreme Court judge Joseph M. Proskauer, according to section 1549 of the New York City Charter, Hulbert automatically vacated his position in city government by accepting an appointment at the state level.