Bas Wiegers studied violin at the Amsterdam Conservatory with Johannes Leertouwer and Peter Brunt, and orchestra conducting with Roland Kieft. In 1999 he received the Kersjes van de Groenekan grant, which allowed him to continue his studies at the Hochschule für Musik Freiburg in Germany, with violinist Rainer Kussmaul. As a violinist, Wiegers was a member of the Asko Ensemble for many years. In addition, he was a guest in various ensembles, such as the Schönberg Ensemble, the Ives Ensemble, and the Remix Ensemble (Portugal). In 2009 Bas Wiegers received the scholarship for conductors from the Kersjesfonds. In September 2012, Wiegers worked under Peter Eötvös with the Royal Concertgebouw Orchestra as second conductor in Charles Ives' Fourth Symphony. He was assistant conductor of the same orchestra under Mariss Jansons in Edgard Varèse’s Amériques, and under Susanna Mälkki during the Holland Festival 2012.
Wiegers has been a guest at various international festivals such as the Gaudeamus Festival, the Huddersfield Contemporary Music Festival, the London Almeida Festival, and Aldeburgh Music Festival. Very active in the world of contemporary classical music, Wiegers worked closely with Louis Andriessen, George Benjamin, Michael Finnissy, Oliver Knussen, Theo Loevendie, Martijn Padding, Klas Torstensson, Klaas de Vries, and many others.