[5] Having received a bursary, he studied aeronautics and astronautics at the University of Southampton,[2][6] graduating with a Bachelor of Engineering (BEng) degree in 1989.

[3] On 1 October 1989, Squires was granted a short service commission in the General Duties Branch of the Royal Air Force (RAF).

[6] He was Commanding Officer of the 906 Expeditionary Air Wing during Operation Unified Protector, the NATO-enforced no-fly zone over Libya, from June 2011.

[14] He was promoted to group captain on 1 January 2012 and,[15] in the 2012 New Year Honours, was appointed an Officer of the Order of the British Empire for his services with No.

[6] It was announced in December 2015 that Squires would be the next Commandant of Royal Air Force College Cranwell.

[1][18] In October 2019 he left Cranwell to take up the post of Head Directorate Operational Capability in the Ministry of Defence.

[19] Squires was promoted to air vice-marshal on 1 September 2022, when he was appointed Commander of British Forces Cyprus and Administrator of the Sovereign Base Areas.