The practice was established in 1956 by A J Macdonald, who was joined in 1962 by C R Barnett and M B Spicer in 1975. A J Macdonald retired in 1985. M R Simpson became a Junior Principal in 1989. Initial experience gained by the principals was mainly with large civil engineering and construction contractors, building materials related industry and international consultancies as both project design and resident site engineers. This experience created the basis for offering a complete civil and structural engineering service to architects and industrial clients. In more recent years, specialist services have been provided for fire engineering design and related fire safety matters pertaining to all aspects of the design and construction sectors: arson investigations; fire reinstatement projects; dangerous goods facilities; failure investigations and reports related to the building, construction and materials industries.