[3] She is known for her roles as Amanda McKay on Nickelodeon's Supah Ninjas,[3][4] as Greer Danville on ABC Family's Chasing Life,[5] as Clementine Lewis on CBS' Zoo, and as Elinor Fairmont on Netflix's First Kill.

After landing a role in the Supah Ninjas pilot, Dzienny and her mother moved to Los Angeles in November 2010.

[3] Her Supah Ninjas co-star George Takei stated in an interview that Dzienny is a "musical theater fan".

[3] In 2014, Dzienny began appearing in the ABC Family drama series Chasing Life playing Greer Danville, the love interest of the lead character's younger sister, Brenna (Haley Ramm).

[8] In 2021, Dzienny played the supporting role of Ruby Red in the Netflix superhero series Jupiter's Legacy.