In 1960 he was appointed by Crown Agents London for service in Nigerian Ports Authority as a Civil Engineer. In this capacity he was responsible for the design and construction of the Floating Dock moorings at the Dockyard Apapa and facilities maintenance in Lagos port. He was promoted Senior Civil Engineer in 1962 and posted to Port Harcourt as Deputy Port Engineer where he was in charge of the supervision of the rehabilitation works being carried out on some of the wharfs. He was promoted Port Engineer when the post became vacant in 1963. He was in charge of the Engineering works in the Port until he was transferred to Lagos early 1965 to take charge of Apapa Port.
Engr. Fisher was appointed to take charge of the whole of the Engineering Department of the Authority in 1967 as he was the most senior engineer with Harbour engineering background at that time. A team of engineers were internally upgraded and their efforts were complimented by recruitment of Nigerian Engineers from abroad with experience of harbour or heavy civil engineering in the following twelve months.
Some of the works Engr. Fisher handled include the Victoria Beach Erosion works in conjunction with Delft Hydraulics laboratory and the Conceptual design of Apapa Third wharf Extension and supervision of its construction. Others are Preliminary conceptual development design and studies with consultants for the Ports of Warri, Calabar and Sapele and supervision of Calabar Port construction.
Since retirement, he has been in engineering related private businesses. He collaborated with Dutch Group and established Ham Dredging Nigeria Ltd. He was Chairman and part time executive Director of the company for the first five years. He established with some Nigerians a deposit money bank and a bulk cement importation Company. .He was director of these companies.
In 1985 he was invited by the Federation of Civil Engineering Contractors to read a paper on âVictoria Beach Erosionâ. The paper was later published by their journal. The following year he was also invited to read a paper on âErosion problems of Victoria Beachâ by the World Dredging Conference held in Brighton UK in 1986. This paper was also published in the journal of the conference.
He is a COREN Registered Engineer, Fellow of the Institution of Civil Engineers London, Fellow of the Nigerian Society of Engineers, Fellow of Institute of Directors, London and Fellow of the Nigerian Academy of Engineering.