[2] Inchiquin then went on to study at Magdalen College, Oxford where he graduated with an MA, and undertook further studies at the Imperial College London's Royal School of Mines,[3] Inchiquin then went on to work in Kenya as a farmer and coffee planter from 1922 until 1936 when he was professionally engaged as a geologist in the mining industry by the Anglo-American Corporation of South Africa.

[6] Inchiquin was subsequently attached to the East African Intelligence Corps[3] in Somaliland, Ethiopia and Madagascar[1] and was mentioned in despatches in 1941,[3] as well as wounded.

[6] After demobilisation he returned to the Anglo-American Corporation of South Africa and worked for the company until he entered the British Colonial Service in 1954.

After succeeding to his brother's peerage, he returned to Ireland where he maintained Thomond House on the former ancestral estate of Dromoland Castle.

The 16th Baron had sold most of the estate including the ancestral seat to billionaire industrialist Bernard McDonough in 1962 and had subsequently built the adjacent Thomond House.