Artistic Director of the Én Pràxi Ensemble, he performs on the violin, viola, and violoncello da spalla, and also works as chamber musician, conductor, and arranger. He has composed works including Prayer for violin, as well as pieces for piano, and for cello with piano. He currently teaches the course Historical Performance Studies at the Graduate Institute of Music, National Yang Ming Chiao Tung University.

Born in Thessaloniki, northern Greece, he was influenced from an early age by his mother (a piano teacher) and his grandfather, Vassilios Theofanous (violinist, conductor, and composer). He received his training in modern violin and related musical disciplines at the State Conservatory of Thessaloniki.

Tsotsolis graduated from the Royal Conservatory of Brussels with the highest diploma in Baroque violin performance, studying with early music masters such as Sigiswald Kuijken, François Fernandez, Herman Stinders and Peter Van Heyghen. At Aristotle University of Thessaloniki, he earned a master’s degree in musicology with distinguished thesis focusing on scordatura.

With many years of professional performing and recording experience in Europe (having recorded over 20 CDs), he has collaborated with renowned ensembles such as La Simphonie du Marais, Les Talens Lyriques, Le Concert Spirituel, La Réjouissance, Real Compañía Ópera de Cámara, Ensemble Almazis, and Ensemble Vocal de Nantes, touring Europe and Asia.

In 2007, he founded the Én Pràxi Ensemble in Paris, serving as its artistic director. Under his leadership, the ensemble has performed at early music festivals in Greece, Taiwan, and South Korea, and in Taiwan has appeared in museums, galleries, and private house concerts.

In 2012, he settled in Taiwan with his family. He has taught early music history at National Tsing Hua University and directed the Baroque string ensemble at Chinese Culture University, while also performing with the Essential Sound Baroque Ensemble. Dedicated to cultivating early music talent in Taiwan, he has served as a strings instructor in the orchestral training program at the National Kaohsiung Center for the Arts (Weiwuying). In 2019, upon recommendation from the Ministry of Culture, he obtained Republic of China (Taiwan) citizenship as a high-level professional talent.

In recent years, he has performed in benefit concerts supporting social causes, aiming to inspire fellow musicians to give back to society.