Since leaving the Ministry of Defence in 2012 he has pursued a new career in the arms industry.
Most recently, Leeson was appointed director of military affairs at Airbus UK in 2016. He has also been a senior strategy adviser on air sector matters for the Defence, Aerospace and Security Division of Atkins since 2013. 
MOD access passes
In October 2017 a freedom of information request by Campaign Against the Arms Trade revealed that both Airbus and Atkins staff held passes (7 and 2 respectively) which allowed them access to the Ministry of Defence buildings in Whitehall. It is not known whether Leeson was among those who hold these passes. Other arms trade companies with such access included Fujitsu (50 passes), BAE (19), PA Consulting (15) and Leonardo (13). 
- Campaign Against the Arms Trade, Sir Kevin Leeson - Meetings, Political Influence database.
- Sir Kevin Leeson, LinkedIn, last accessed 15 September 2017.
- Ministry of Defence reply to CAAT Freedom of Information request dated 18 September 2018], accessed 29 January 2018
- *Campaign Against the Arms Trade, Sir Kevin Leeson - Meetings, Political Influence database, last accessed March 2018