Following this Fitzmaurice was Chief Engineer to the London County Council and was responsible for the Blackwall, Rotherhithe and Woolwich tunnels.

In later life his consultancy advised on docks and harbours across the British Commonwealth as well as the Sennar Dam in Sudan and he was recognised with the prestigious honour of the presidency of the Institution of Civil Engineers for the 1916-17 session.

[2] He received an education at The Royal School, Armagh prior to studying civil engineering at Trinity College, Dublin from 1878.

[1] From 1912 he was a partner in John Coode's firm of engineers and worked extensively on docks, including designs for harbours in Australia, Burma, Ceylon, Hong Kong,[10] Kenya, Malaya, Nigeria, Singapore and the United Kingdom.

From 1922 Fitzmaurice was also an advisor to the Sudanese government on irrigation of the Blue Nile including the plans for the Sennar Dam, which was built after his death.