Paulina Waski was born in Greenwich, Connecticut and began her ballet training at the age of seven under the guidance of ABT alumni, Denise Lewis and Mark Grothman in Connecticut. In 2006, Waski began attending American Ballet Theatre's Summer Intensive programs in New York City, and was invited to join the Jacqueline Kennedy Onassis School at ABT that same year. At age 12, Waski placed in the top twelve at the 2008 Youth American Grand Prix, junior division in Philadelphia. The following year Waski accepted her invitation to join the JKO School under the direction of Franco De Vita and Raymond Lukens. Waski was awarded the Laura and James Rosenwald Scholarship in 2010 and the 2010-2011 Scünci National Training Scholarship for ABT's New York Summer Intensive.
Waski performed the principal role in Susan Jaffe's world premiere We Insist at the 2011 JKO School Spring Performance. While at the JKO School, Waski danced soloist roles in excerpts from Les Sylphides, Coppélia, Raymond Lukens and Franco De Vita's Jerusalem Divertissement, and pieces choreographed by Jessica Lang and Kanji Segawa. Waski's roles with the ABT Studio Company included performing at The Kennedy Center in Washington D.C. as part of The Presidency of John F. Kennedy: A 50th Anniversary Celebration. Her roles also included Canzonetta pas de deux in Antony Tudor's Soirée Musicale and a soloist role in August Bournonville's Napoli.
In October 2011, at age 16, Waski joined the main Company as an apprentice and became a member of the corps de ballet in May 2012. Her repertoire includes one of the Nutcracker's Sisters in Alexei Ratmansky's The Nutcracker, the Sapphire Fairy in The Sleeping Beauty, a big swan in Swan Lake and a roles in Bach Partita, Jardin aux Lilas and Raymonda Divertissements, as well as roles in all of the Company's full-length ballets.