Brigadier-General Sir Alexander Gibb was a Scottish civil engineer. After serving as Civil Engineer-in-Chief to the Admiralty and Director-General of Civil Engineering at the Ministry of Transport, he established the engineering consultancy firm Sir Alexander Gibb & Partners.

Sir Alexander Gibb & Partners was a British firm of consulting civil engineers, founded in 1922 by Sir Alexander Gibb, and initially headquartered in London before moving west to Reading in Berkshire in 1974 to the former site of Suttons Seeds. In 1989, the firm merged with Atlanta, Georgia-based Law Engineering and Environmental Services. In 2001 Law sold the Gibb business to another US-based firm, Jacobs Engineering Group.