On Graduation from the RAF College Cranwell as a pilot her specialised as a transport pilot flying Hastings and later Hercules aircraft serving with 24 and 36 Squadrons.
In the early 1970s he graduated from the RAF Staff College at Bracknell and served at HQ 46 Group, Upavon as Personal Staff Officer to Sir Dennis Crowley-Milling and Lord Cameron (both Battle of Britain veterans). After a short tour in Hong Kong as an air intelligence officer he completed the Air Warfare Course at Cranwell and commanded LXX (70) Squadron from 1977 to 1979. During this tour he commanded the RAF's participation in the UK's humanitarian support for the victims of the Kolwesi massacre in Zaire and later he commanded the successful evacuation of some 3,000 British and friendly foreign nationals from Teheran. Following this tour he was appointed an OBE.
In the early 1980s he held a number of staff planning appointments at the Ministry of Defence, RAF Strike Command and RAF Germany. He returned for RAF Germany in 1985 on promotion to Group Captain to take command of RAF Hullavington in Wiltshire. He has some 4,000 flying hours on transport aircraft.
In 1987 he became air Attache at the British Embassy in Madrid and in 1990 was appointed the UK's first Defence Attache in Buenos Aires after the resumption of diplomatic relations with Argentina earlier that year. On his return form Buenos Aires he was posted as Deputy Director of Operations in the joint Headquarters at RAF High Wycombe. He volunteered to to take early retirement in 1993.
Patrick then joined The Royal British Legion as the first Kent County Field Officer responsible for disbursing welfare assistance to the ex-Service community in need and fundraising, including the annual Poppy Appeal in Kent. He retired from this post in May 2005.
Patrick was appointed a Deputy Lieutenant of Kent in May 2004. He is president of the Aylesford and Malling Royal Air Forces Association Branch, President of 2374 (Ditton) Squadron Air Training Corps and Hon Secretary of the Battle of Britain Memorial Trust which is responsible for the maintenance of the National Memorial at Capel-Le-Ferne near Folkestone, to those who fought, flew and died in the Battle of Britain. He is also Hon Secretary of the Battle of Britain Fighter Association, the Association of the surviving Few and Treasurer of the Bentley Priory Battle of Britain Trust.