She is currently serving as the first President of the Kosovo Specialist Chambers – a position to which she was appointed in December 2016 for a four-year term and took her office on 12 January 2017.
Together with her colleagues of Pre-Trial Chamber II, Judge Trendafilova made the landmark decision that saw President Uhuru Kenyatta, his Deputy William Ruto, former Head of Civil Service Francis Muthaura and journalist Joshua Sang committed to trial in January 2012.
[7] Judge Trendafilova addressed for the first time at the International Criminal Court the issue whether members of armed groups engaged in a non-international armed conflict may be held accountable for war crimes, in particular rape and sexual slavery, committed against fellow fighters; and whether the war crime of intentionally attacking civilians may be committed through conduct other than the traditional shelling or bombarding, such as by raping, destruction of civilian properties and pillaging towns and villages in the course of military operations.
[8] In February 2015, sitting in the Appeals Chamber, Judge Trendafilova dissented from the decision to uphold the Trial Chamber’s acquittal of Mathieu Ngudjolo Chui, a militia leader of commanding fighters who destroyed the village of Bogoro in eastern Congo in 2003, raping and hacking to death some 200 people, including children.
[10] In 1998–1999 she was the head of the working group on the reform of the Bulgarian Criminal Procedure Code in line with European and international standards for efficient administration of justice and an effective protection of human rights.
Within the purview of the criminal justice reform, Trendafilova was invited to the International Visitor Leadership Program (Criminal Justice Issues), hosted by the US Department of State with working visits to judicial and law enforcement institutions in Washington, New York, Salt Lake City, Denver, San Diego.
In 2014 Trendafilova was awarded the Golden Badge of Honour of the Ministry of Foreign Affairs for the promotion of the prestige of the Republic of Bulgaria in the administration of International Justice.