Jonathan is an international affairs professional with expertise on security, defence and intelligence issues in Northeast Asia. He has held a variety of positions in the private and public sector. Currently, he is a Senior Fellow with the Japan Institute of International Affairs (JIIA) and Deputy Director and a Senior Fellow at the Centre for Advancing Canada's Interests Abroad at the Macdonald-Laurier Institute. He is also a Distinguished Fellow with the Asia-Pacific Foundation of Canada. Additionally, he is currently holds senior fellowships on East Asia with the New York-based EastWest Institute and the Asian Forum Japan, based in Tokyo. Miller is founder and Director of the Council on International Policy in Ottawa. He also holds appointments as Canada’s ASEAN Regional Forum Expert and Eminent Person (EEP) and as a Responsible Leader for the BMW Foundation.

Previously, he was an international affairs fellow with the Council on Foreign Relations, based in Tokyo. Miller also held a fellowship on Japan with the Pacific Forum CSIS from 2013-16, and has held a number of other visiting fellowships on Asian security matters, including at JIIA and the National Institute of Defense Studies (Ministry of Defense - Japan).

In addition, Miller previously spent nearly a decade working on economic and security issues related to Asia with the Canadian federal government and worked both with the foreign ministry and the security community. He regularly attends track 1.5 and track 2 dialogues in the region and lectures to universities, think-tanks, corporations and others across the Asia-Pacific region on security and defense issues. He also regularly provides advice and presents to multilateral organizations and foreign governments on regional geopolitics.

Jonathan is a regular contributor to several journals, magazines and newspapers on Asia-Pacific security issues including w. He has also published widely in other outlets including Forbes, Newsweek Japan, the Globe and Mail, the World Affairs Journal, the Japan Times, the Mainichi Shimbun, the ASAN Forum, Jane’s Intelligence Review and Global Asia. Miller has been interviewed and quoted on regional security issues across a wide range of media including the New York Times, the Washington Post, the Wall Street Journal, Reuters, CNN, CNBC, Bloomberg, Le Monde, Nikkei, the Japan Times, Asahi Shimbun, the Voice of America, the Globe and Mail and ABC news.