He is a member of South Korean boy group Monsta X and its sub-unit Shownu X Hyungwon under Starship Entertainment.

[6][7] Beginning in December 2014, he competed in the Mnet's survival show No.Mercy, through which he debuted in the new hip-hop boy group Monsta X.

For the show, they transformed into different "sub-characters" for each episode to introduce the latest trends and G-Market global shop products in entertainment format.

[33] In November, Hyungwon starred in the new KakaoTV musical web series Fly Again as Han Yo-han, his first-ever lead role.

It revolved around how he changed his dream, from being a genius dancer to becoming an idol upon meeting the school's dance club "Villainz".

For this season, they focused on a concept of "what if" and perform situational plays on various themes, moving freely to any desired time, such as the past, present, and future.

[39] In September, Hyungwon was cast as the main character in the new TVING drama CEO-dol Mart, alongside Exo's Xiumin and Lee Shin-young, produced by The Great Show.

[40][41] On September 30, he attended the DJing party 2022 DG Night, held at the Martini Bar of Dolce & Gabbana,[42] as well as attending the pop-up store opening of Tommy Hilfiger's capsule collection, in collaboration with Richard Quinn, alongside Twice's Nayeon, held in Cheongdam-dong, Seoul.

[45] In February, Hyungwon and Minhyuk attended the Dyson Style Lab pop-up store's opening ceremony, held in Seongdong-gu, Seoul.

[47] In March, Hyungwon was announced to be a special MC of SBS' Inkigayo, alongside Kim Ji-eun, starting in April,[48] ending in July.

[50] On June 29, Hyungwon and Shownu attended the pop-up opening event of TAG Heuer's "Iconic Collection Carrera", in commemoration of its 60th anniversary, held in Gangnam-gu, Seoul.

[75] In November 2021, as part of Monsta X's promotional campaign for traditional Korean culture, Hyungwon and Minhyuk participated in a video narration for the YouTube series Kimchi Universe 3, jointly produced by Daesang Jonggajib and World Kimchi Research Institute together with Professor Seo Kyung-duk of Sungshin Women's University.

[76][77] In July 2019, Hyungwon and VIXX's Hongbin became the Korean representatives for the global beverage brand Pepsi's "The Love of Summer" campaign.

[78] In July 2022, he became the model for the French premium mineral water brand Evian, which also launched a limited edition collection with the beagle character Snoopy through the men's magazine Esquire Korea.

[79] In August, Hyungwon promoted the French skincare brand Avène's cleanser through the Korean fashion, beauty, and life magazine Singles.

[80] In October, he became the new model for the American denim jeans brand Lee's winter collection through the fashion magazine W Korea.

[86] On October 28, Hyungwon attended the fashion magazine W Korea's breast cancer awareness campaign "Love Your W" charity event, with his group member Minhyuk, held at the Four Seasons Hotel in Gwanghwamun, Seoul.