He was awarded a golden medal, an honorary diploma of the Ministry of Education and won first place in the School National Olympiad of Literature.

In 1992, he started as a reporter at Po sveta i u nas (“Home and abroad”), the prime time news show of Channel 1 of BNT, covering topics in the field of foreign policy and justice.

[3] In September 2000, Vassilev became the lead presenter and producer of Panorama, while at different moments also serving as chief editor of current affairs and head of news.

Vassilev has produced many documentaries, including The Vengeance Day, about the war in Kosovo (1999), The Bullet Train, Island Song (Japan – 2004), Eyes Not Forgotten (2004), The Elder Brother, about St. Methodius (2005), Fathers’ Children, about the descendants of the Fathers of Europe (2007), Liberation Square (Egypt – 2011), Mark’s Way (Albania – 2011), 20 Years Later (Bosnia – 2011), Cathedral and Mosque (Germany – 2012), Boiling Point (Syria – 2012), Airport for Nowhere (N. Karabakh – 2012), The Walls of Europe (2014), Guardians of Shadows (2014), The Autumn of Auld Songs (together with Polly Zlatareva, in Scotland and Catalonia, 2014), The Star of the Magi (together with Polly Zlatareva, 2014), Battlefield (Iraqi Kurdistan, 2015), The Great Powers (2015), The Wave (the refugee issue in Germany – 2016), American Judge (2016) and Walking of Wonders, about St. Clement of Ohrid (2016).

[citation needed] Throughout his career, Vassilev has interviewed many prominent international leaders such as George W. Bush, Tony Blair, Gerhard Schröder, José María Aznar, Recep Tayyip Erdoğan among others.