Oksana Sitnitska was born in Ternopol', in the West Ukraine, on October 9, 1971 into a family of school teachers.

From 1980 to 1985 she studied the class bandura, voice, and piano at the State Music School. From 1986 to 1990 Oksana continued her musical education at the State Music College in Ternopol', with focuses on orchestral conducting, the bandura, and voice. From 1990 to 1997 she studied in the vocal department at the State Music Academy of L'viv, with professor Igor Kushpler.

Oksana obtained her BM in Vocal Arts, graduated with Honors and began her career as an opera singer, chamber singer and coach of vocal arts. From 1996 to 2004 Oksana worked as a permanent soloist at the State Opera House of L'viv, performing in the following operas: Fidalma in Cimaros'a Secret Marriage, Lola in Caverleria Rusticana, Olga in Eugene Onegin, the title role in Carmen, Rosina in Barber of Seville, Amneris in Aida, and Fenena in Nabucco.

In 1999 she was awarded the III Prize at the Lucia Popp International Vocal Competition in Bratislava, Slovakia. In 2000 Oksana was accepted to graduate school at Dresden High Music Academy in Germany, studio of Maestro Elsner. She attended the Music Institute in Baden-Baden, Austria, studio of Dr. Eva Blagova. From 2000 to 2003 she held a position as a professor of Vocal Arts at the State Music Academy in L'viv, Ukraine. Oksana had a contract with Da Capo, the management company in Kufstein, Austria, from 2000 to 2004. She performed as an opera soloist in European Opera Houses in Germany, Austria, Switzerland, Poland, Slovakia, Ukraine, and Beirut.

Oksana moved to America as a permanent resident in 2004, and is looking forward to expanding her career in the United States.