Educated at D. S. Senanayake College, and Royal College, Colombo. Graduated with a BA Economics from Davidson College, North Carolina. Completed internships in international development with NGOs in Washington, DC, and then UNFPA and UNDP in New York. Obtained a MA in International Economics & Finance from Brandeis University International Business School, Massachusetts including study at the Faculty of Business Administration, National University of Singapore.
Following a stint at Price Waterhouse, Colombo, Gihantha got his start in brand marketing at Unilever Ceylon delivering innovation and communication campaigns for Signal, SunSilk and Lifebuoy. Moving to the UK, obtained a Post Graduate Diploma from the Chartered Institute of Marketing (CIM), and then led innovation project management and communication campaigns for blue chip brands Kingsmill, Birds Eye and Persil (Unilever), as well as health care brands TCP and Prevalin.
Gihantha joined APSL in 2008, becoming an Executive Committee Member in 2009. His foremost contribution at APSL was initiating and leading the ‘We Sri Lanka’ project (2010-12) aimed at encouraging greater connectivity and reconciliation among the Sri Lankan diaspora in the UK, as well as supporting the post conflict rebuilding effort in Sri Lanka.