Demyan is a diplomat and published researcher on international relations and security.

Currently a Senior Analyst and Acting Team Lead at Global Affairs Canada (GAC), leading research, analysis, and advice on top foreign policy priorities. At GAC, he has worked on G7 and NATO priorities, Europe, and North Africa.

Concurrently, Demyan is a Fellow at the North American and Arctic Defence and Security Network (NAADSN). He has worked at the United Nations headquarters in New York, five government departments in Canada, NATO Association of Canada, in academic positions at Western University and Carleton University, and with other organizations.

He has an MA specializing in European, Russian, and Eurasian Studies from Carleton University, and a BA Honours Specialization in Political Science from Western University and the University of Copenhagen.