Ambassador Ustubs began his posting as the European Union's top diplomat in Canada in September 2017. Prior to his arrival in Canada, he served as Americas Senior Advisor in the Cabinet of Federica Mogherini, High Representative of the European Union for Foreign Affairs and Security Policy/Vice-President of the European Commission.
Ambassador Ustubs has held senior positions with the European External Action Service (EEAS), including as Director for West and Central Africa. Prior to that, he was Deputy Head of Cabinet of Andris Piebalgs, former European Commissioner for Development.
Ambassador Ustubs joined the Latvian diplomatic service in 1993 and served as the Representative of Latvia to the Political and Security Committee of the EU, the Foreign Policy Advisor to the Prime Minister and Under-Secretary of State – Political Director of the Ministry of Foreign Affairs.