He was involved in the development of the M5 and M6 motorways and in bringing the Birmingham Inner Ring Road under the control of his county (rather than the city authority).
Mustow retired from municipal work in 1986 to enter private practice and was later a director at WS Atkins.
[1][2] Mustow spent his early career in local government, during which time he supported the development of the M5 and M6 motorways, and was county surveyor for the West Midlands from 1974 to 1986.
[3][4] During his time in office it was discovered that defective cement had been used in bridge beams at St Chad's Circus and eight other locations on the Birmingham Inner Ring Road, much of this had been built by the same contractor; as a consequence, in July 1978 Mustow recommended that the responsibility for maintenance of the road be taken from Birmingham City Council and given to West Midlands County Council.
[3] Mustow was appointed a Commander of the Order of the British Empire in the 1995 New Year Honours for services to civil engineering, at which point he was a non-executive director of WS Atkins.