Sunye made her official solo debut with the EP Genuine on July 26, 2022, after signing with Blockberry Creative, a subsidiary of Polaris Entertainment, in February 2022.

In 2001, Sunye was discovered by JYP Entertainment during Park Jin-young's "99% Challenge" project, where she sang and danced.

Sunye was one of the longest serving trainees at JYP Entertainment, along with Jo Kwon of 2AM and Min of Miss A.

[6] On January 26, 2013, JYP Entertainment confirmed that Sunye would stop her official promotions with the Wonder Girls just before marrying James Park, her Korean-Canadian fiancé.

][8][9][10] In December 2014, Sunye stated in an interview with Joongang Ilbo's US branch at a non-profit church concert that she would continue missionary work; this was reported in the press as her leaving the Wonder Girls and the entertainment industry.

Sunye has contributed her vocals on the tracks of various Korean artists, including Mighty Mouth's "Energy" and Park Jin-young's "Afternoon Separation."

In addition to recording collaborations, Sunye has also performed with other artists on stage, including "Stand Up for Love" with Davichi and Taeyeon on SBS Gayo Daejeon in 2008.

[19] In 2021, the teaser for reality show Mama The Idol was released with Sunye confirmed as one of the cast members.

[23] Along with the other Wonder Girls members, Sunye often makes charitable donations to various charities, hospitals, and orphanages around Korea.

He hasn't been able to wash in a while so there was a very bad stench coming from him but Sunye paid no attention to it and held his hands tightly, asking him to live a long life.

In May 2011, Sunye went on a week-long volunteer mission to Haiti, where she cared for children in an orphanage and treated victims of cholera.

On October 16, 2012, Sunye was a guest speaker at George Washington University, where she presented a lecture about K-Pop, "An Idol Star's Illusions and Responsibility.

[27][28][29] On March 18, 2014, Sunye announced she and her husband would leave for Haiti in July, where they would live for five years to continue doing missionary work.

She took the first flight from New York, where she resided at the time, to South Korea, skipping out on numerous promotional events to be with her father.