He is a member of the South Korean boy band Seventeen, its Vocal Team, and the leader of its sub-unit BSS with Hoshi and Seungkwan.

In 2019, DK made his musical theatre debut with the lead role Arthur in XCalibur, the South Korean production of Artus-Excalibur.

[9] DK joined Pledis Entertainment in late 2011, having auditioned for the company after being inspired by South Korean singer Yoon Do-hyun's career.

[25][26][27] On February 28, 2019, DK was cast as Arthur, a leading role in the South Korean production of Artus-Excalibur titled Xcalibur at the Sejong Center,[28] marking his debut as a musical actor.

[44] Despite opening during the COVID-19 pandemic, the second season of the musical was recognized as a success, garnering standing ovations at every show[45] and praises for DK's performance.

[12] In 2022, Newsen's Lee Seul-gi reported that DK has been recognized for his vocal skills, which display a wide range and rich volume.

[49] After his appearance on King of Masked Singer, Park Hee-ah of Melon described his voice as having "solid vocalization, high range, and flexible rhythm.

[55][56] Bally CEO Nicolas Girotto cited his versatility, fashionable demeanor, and amiable disposition as decisive elements in his appointment as the brand's latest global ambassador.

[62][63] DK has been recognized by fans for his compassionate and empathetic nature, as showcased in an episode of a Dingo Story YouTube series titled "수고했어 오늘도" (translated: Good Job Today Too), released on February 13, 2023.

[64][65] DK enjoys releasing cover songs on Seventeen's YouTube channel, having shared performances of "The Road",[66] "Amusement Park",[67] "Betelgeuse",[68] and "Sequel",[69] among others.