Damian is a lawyer in the Australian Army and holds the rank of Lieutenant Colonel.  Since joining the Army Legal Corps in 2006 he has served in a variety of appointments. As a lawyer in the Department of Defence, Directorate of Operations and Security Law in Canberra, Damian completed Article 36 reviews on a range of new weapons introduced into the Australian Defence Force.  His PhD thesis considers the ability of international humanitarian law (IHL) to regulate new technology weapons.  He uses the Art 36 weapons review process to consider existing and future challenges to IHL presented by autonomous weapons, cyber weapons, and weapons enhanced by artificial intelligence.