Ambassador Aryasinha was Foreign Secretary of Sri Lanka from 31 October 2018 to 15 August 2020. A retired member of the Sri Lanka Foreign Service (SLFS), he served as the Ambassador of Sri Lanka to the USA (December 2020-September 2021), Sri Lanka’s Permanent Representative to the United Nations in Geneva and Consul General of Sri Lanka to Switzerland, with concurrent accreditation as Sri Lanka’s Ambassador to the Holy See (July 2012-March 2018), Sri Lanka’s Ambassador to Belgium, Luxembourg and to the European Union (April 2008-June 2012). Previously he was the Deputy Chief of Mission with Ambassador rank in the Sri Lanka Embassy in the USA and Second Secretary in the Sri Lanka High Commission in India. In the Foreign Ministry, from 1995-2000, and again from March 2007-March 2008 he headed the Public Diplomacy Division and was the Foreign Ministry Spokesman, and from April-October 2018 as Additional Secretary/Economic Affairs and Trade led the Economic Diplomacy Programme (EDP).

On leave from the SLFS, from 1993-1995, he also served as the National Information Officer in the Office of the United Nations Resident Coordinator in Sri Lanka. Prior to joining the Foreign Service, he started his professional life in 1981 as a journalist at the Ceylon Daily News and was a pioneer in the setting up of the Sri Lanka Rupavahini (TV) Corporation, where he served as Senior Political Correspondent from 1982-88.

He holds a Bachelor of Arts Degree in Philosophy, Politics and Economics from the University of Peradeniya (1984) and a Master of Arts Degree in International Relations from the University of Colombo (1990). A ‘Hurst Fellow’ in International Relations at the School of International Service (SIS), American University, Washington DC, USA (2001/2002), Ambassador Aryasinha is currently a Ph.D. Candidate in International Relations at the University of Colombo. He is also on the visiting faculty of the Sir John Kotelawala Defence University (KDU) and the Bandaranaike Centre for International Studies (BCIS).