At her neighborhood's small hip-hop school,[4] she learned hip hop, jazz and Latin dance.

She received dance instruction from the Electric Boogaloos[10] and top choreographers such as Kim Hye-rang,[11] Poppin Seen,[12] Kwang Hoo (aka Crazy Monkey), Poppin DS,[13] Kwon Seok-jin (aka Locking Khan)[14] and Black Beat's Shim Jae-won.

[4] Before debuting with Girls' Generation, she worked with a choreographer for Janet Jackson[15] and was BoA's silhouette dancer during a performance at M.net KM Music Festival 2005.

[21] On January 7, 2009, the group released their extended play (EP) Gee, its title track claimed the number-one position on KBS's Music Bank for a record-breaking nine consecutive weeks, becoming the longest-running number-one song on Music Bank until 2012, when Psy's "Gangnam Style" claimed the top spot for ten consecutive weeks.

[24] On March 7, Hyoyeon and fellow Girls' Generation members Jessica and Sooyoung played cameo roles in episode 7 of the SBS television mini-series Oh!

[36][37] On February 12, 2015, Hyoyeon was featured in labelmate Amber's "Shake That Brass" music video, in which she plays a trumpet.

On July 1, Hyoyeon became the first Girls' Generation member to publish a book with Hyo Style, in which she shares tips on beauty, fashion and lifestyle.

The show followed 12 Korean and Chinese celebrities tasked with working as office workers in foreign countries and premiered on July 9.

[41] Before the show was officially announced, an Instagram account was created where Hyoyeon posted pictures and videos with the goal of receiving one million likes from fans.

[45] In September 2015, Hyoyeon became a contestant alongside Seo In Young, Mir and Hyejeong, among others, in a television show titled Mash Up, where they competed in DJing.

[48] In June 2016, she became a contestant alongside Taemin, Bora and Hoya, among others, in the Mnet television show Hit The Stage,[49] where they collaborate with professional dancers to compete in different genres of dancing under a given theme.

In the same month, Hyoyeon was featured in the song "Up & Down" from fellow Girls' Generation member Taeyeon's second extended play Why.

In August 2016, she collaborated with Min and Jo Kwon to form a special group named Triple T and release a single titled "Born to Be Wild", featuring Park Jin-young, as part of S.M.

[52] In December 2016, Hyoyeon released her first solo song since debut titled "Mystery" as another single for SM Station.

[citation needed] In June 2017, Hyoyeon released her second single "Wannabe", a pop dance song featuring rapper San E.[54] A month later, Girls' Generation announced the release of their sixth Korean-language studio album to commemorate the group's tenth anniversary.

[58] It was also revealed that she would also be promoting actively as a DJ in domestic club tours and EDM festivals under her new stage name.

[59] In August 2018, Hyoyeon was announced to be part of Girls' Generation's second sub-unit, Oh!GG, which consists of the five members of the group who remained under SM Entertainment.

On December 27, Hyoyeon was revealed as a member of supergroup Got the Beat, alongside Girls' Generation groupmate Taeyeon and other labelmates.

On May 17, it was announced that Girls' Generation will have a full-group comeback for their fifteenth anniversary in August, ending their five-year hiatus, which will include Hyoyeon.

[68][69] Their seventh Korean-language studio album, Forever 1, was released in August 2022, peaking at number two on the Circle Chart.