Tatjana Vasle graduated with honours (cum laude) from singing at the Academy of Music in Ljubljana in the class of prof. Irena Baar. She performed as a soloist with the Orchestra of the Academy of Music, Slovene Philharmonic Orchestra, Symphonic Orchestra Domžale and Capella Civica Orchestra from Trieste in the performances od vocal-instrumental works and at chamber and solo concerts in Slovenia, Italia, Austria and Croatia. She participated in recordings for the archives of Radio Television Slovenia and performed as a soloist with Symphonic Orchestra RTV Slovenia.

She is employed as a professor of singing and head of singing department at the Conservatory of Music and Ballet Ljubljana and at the Academy of Music in Ljubljana, where she works as a technical advisor in the field of vocal technique. 

Her students are the recipients of numerous awards in the national competition TEMSIG (from 2000-2016) ) and also successfuly participated in international competitions Lazar Jovanović in Belgrade (2011, 2012, 2013), Bruna Špiler in Hercegnovi  (2013, 2014, 2015), Daleki akordi in Split (2018), International Competition “Giovani Musicisti – Città di Treviso” Italia (2015), International competition Iuventus canti, Vrable, Slovakia (2017), The 6th International Singing Competition Alina Vane, Latvija (2020), International Singing Competition Aegis Carminis, Koper, Slovenia (2021), International Singing Competition IMMCC Maribor, Slovenia (2021), 2. International Singing Competition Musica Goritiensis 2022, where they have won numerous gold medals. 

Many of them continue their studies at the Academy of Music in Haag, Vienna, Graz, Berlin, Zagreb and Ljubljana.

She  runs numerous singing masterclasses in Slovenia, as a consultant of vocal technique she works with the best Slovenian choirs (Carmina Slovenica, Chamber Chour Ave, Academic Choir Tone Tomšič, Bodeča Neža and others) and participates as member of the jury at singing and other musical competitions and auditions at home and abroad. 

She is active in Association of Slovenian vocal pedagogues and attends professional meetings organized by EVTA (European Voice Teachers Association).

In 2018 Conservatory for music and ballet awarded her with »Škerjanc diploma«, which is the highest award for pedagogy.