[3][4][5][6] In 2018, Indatissa was awarded for his leadership in promoting sustainable development goals, by Sri Lanka United Nations Friendship Organisation.
In 1982, at the age of 17, he enrolled at Sri Lanka Law College, where he excelled in his studies.
Such as Susanthika Jayasinghe in 1991 at an arbitration held by the International Athletics Association in Monaco (Regarding the Sydney Olympics), Arjuna Ranatunga (regarding a ICC match-fixing inquiry), here Indatissa acted as junior counsel to S. L. Gunasekara, Manju Wanniarachchi in both Delhi and Malaysia, and Sanath Jayasuriya for a ongoing ICC investigation by the ICC.
He also was appointed to commissions looking into the deaths of Lalith Athulathmudali, and General Denzil Kobbekaduwa.
Such as being a member of Central Environmental Authority, a trustee of the Mahapola Higher Educational Trust Fund.
He has authored numerous articles, and has published 46 books on a wide range of legal topics.