[citation needed] On July 30, 2012, Hyejeong made her debut as a member of AOA on Mnet's M!

[11] Hyejeong appeared in the music video for boy band Phantom's song "Seoul Lonely" which was released on May 19, 2014.

[12] On March 4, 2015, it was revealed that Hyejeong will be part of MBC's new variety show "Soulmate Returns".

[13] On September 10, 2015, Hyejeong was listed in the lineup for SBS MTV EDM Program 'Mashup' that will be aired on 21st at 11PM KST for the first time.

[15] In March 2017, it was confirmed that Hyejeong will join tvN's Saturday Night Live Korea for season 9.

In January 2018, casual denim brand Buckaroo announced Hyejeong as their new model for the 2018 S/S season.

[17] In February 2018, it was announced that Hyejeong will have a lead role in the SBS weekend drama Nice Witch as flight attendant Joo Yebin.