Frazer-Nash Consultancy – founded in 1990 and based in Leatherhead, United Kingdom – is a systems, engineering, and technology consultancy that helps organisations deliver innovative solutions to make lives safer, more secure, sustainable, and affordable. The company employs approximately 1,500 people and operates from a network of UK and Australian locations, serving clients across various sectors, including defence, aerospace, energy, nuclear, transport, infrastructure, and digital systems.

Frazer-Nash provides multidisciplinary expertise in systems engineering, technical assurance, cyber and information systems, and strategic advisory services, supporting complex and safety-critical programmes throughout their lifecycle.