A native of Boston, Zynsky was known as "Toots" almost from the time she was born.
She studied at the Rhode Island School of Design, receiving her BFA before traveling to Seattle to work at the Pilchuck Glass School under Dale Chihuly; she has continued to return there as an instructor.
Zynsky's work is known for featuring the filet-de-verre technique, which she pioneered, in which fine threads are pulled from glass canes.
In 1988 she was awarded the Rakow Commission for work added to The Corning Museum of Glass.
[3] She designed the torch, in the shape of a prosthetic limb, for the 2002 Paralympic Winter Games.