His position prior to the 2012 appointment was that of Harbour Master for the Lower District of the Port of London Authority in the United Kingdom.
[5][6] At Warsash Maritime Academy, part of Southampton Solent University, Stanbrook taught radar, vessel handling, and bridge team management, and became a Senior Lecturer.
[4][5][7] In 2001, Stanbrook was appointed as the Deputy Harbour Master on the River Thames for the Lower District of the Port of London Authority.
[6][9][11] He succeeded Gordon Dickins, who retired from the Port of London Authority after having served in a number of senior positions over a period of 32 years.
[14] His predecessor in Gibraltar was Captain Peter W. Hall, who served in that position from August 2008 to October 2011, after having unexpectedly resigned in September 2011.
[15][16][17] Captain Stanbrook, a married father of two, is a Fellow of the Nautical Institute (FNI), an international organization for maritime professionals.