After taking a summer internship at the Broadway Dance Center, DiNoia opted to move to New York City in search of stage work, primarily as a dancer.
In 2003, while on the Mamma Mia tour, DiNoia was inspired after hearing "Defying Gravity", the signature song from the recently released musical Wicked, and took her first professional singing lessons.
[2] In the Summer of 2004, DiNoia joined the Las Vegas production of We Will Rock You, appearing as part of the original American cast in the ensemble and later as understudy for the lead role Scaramouche.
Following the closure, DiNoia transferred to the Broadway production of Wicked, taking over the role of Elphaba standby from Julie Reiber.
In the November of the same year, DiNoia travelled to Sydney, Australia to provide emergency standby for Elphaba for one month, departing in December 2009.
[5] In February 2015 DiNoia joined the 1st national tour of Wicked in Los Angeles, CA for a limited four-week engagement, following the unexpected sudden departure of Elphaba actress Emma Hunton.
[6] Following the closure of Wicked's 1st national tour, it was announced that DiNoia would be succeeding Christine Dwyer as temporary lead Elphaba in the Broadway production, at the Gershwin Theatre, starting on March 19, 2015.
[8][9][10] She then performed as emergency cover for Elphaba at The Kennedy Center in Washington, D.C. as part of the show's 2nd national tour from December 8-10, 2022.
[11] In August 2020, DiNoia was featured on the soundtrack Broadway Sings Blood Rock: The Musical with Andy Mientus, Damon Daunno, and Robert Torti.