Gretha Tuls was born in Enschede, The Netherlands. She studied at the Royal conservatoire in The Hague and the Musikhochschule Mannheim with Johan Steinmann, prof. Gustavo Núñez, Dorian Cooke, prof. Ole Kristian T. Dahl. She has worked as a freelancer in Norway, France, Germany and the Netherlands with different orchestras and contemporary music groups. Gretha was pinicipal Bassoon in Norrkopings Symphony Orchestra in Sweden in 2006. In 2010 she joined the CBSO as principal bassoon and shortly after started working with Birmingham Contemporary Music Group. She is now Section Leader for the Hallé.