In 1945, Tyng moved to Philadelphia and became employed at Louis Kahn's architectural practice, Stonorov and Kahn. Her fascination with complex geometrical shapes had a strong influence on several projects, most notably on the five cubes that comprise the Trenton Bath House and the triangular ceiling of Yale Art Gallery. Tyng also said that the concept for Kahn's famous "City Tower" design was largely her invention, although when the model was included in a show at the Museum of Modern Art, at first, Kahn left her name off of the credit label. The two also collaborated on the Esherick Studio and on Bryn Mawr's Erdman Hall.