Jerald Justin Ko, better known by the stage name JK / JK Power98, is a Singaporean radio personality.

^[1] Since 2010, JK has been working as a radio disc jockey for Singapore-based music station Power98FM. ^[2]

Ko is an alumnus of the University of Western Australia ^[3] and was the face for their Open Day Campaign in Singapore for 2014. ^[4]

One of the most recognizable faces on the events stage in Singapore, ^[5] JK has been an emcee for hundreds of events over the years, and is well known for hosting races, many of which have seen more than 20,000 participants.

Some of these include Nike We Run SG, ^[6] the 2XU Compression Run, ^[7] The SAFRA Singapore Bay Run & Army Half Marathon, ^[8] The Pocari Sweat Run, ^[9] The North Face 100 Singapore, ^[1] and the Energizer Singapore Night Trail, ^[1] in addition to charity racing events for the National University of Singapore ^[1] and The SingTel Singapore Cancer Society's Race Against Cancer. ^[1]

JK has also hosted a wide variety of events including press conferences, roadshows, carnivals, official ceremonies, as well as various corporate functions with clients like BMW, Exxon Mobil, and MINDEF.

^[1]

In August 2015, JK hosted the National Day Parade 2015 Celebrations @ The Float, in front of a crowd of 26,000 people.

^[1]

Since 2010, JK's voice has featured in various commercials for clients like Ben & Jerry's, SingTel, and Clear Men.

Known for his lively and vibrant tone, he was also the narrator for Defence News in a Nutshell (DNN) which features the latest news in the Singapore Armed Forces and is watched by more than 100,000 National Servicemen fortnightly.

^[1]

In 2011, JK spearheaded a campaign for SingTel, titled "Operation Command & Deliver", which helped NSFs in Singapore fulfill their wishes and expressions of love towards their loved ones.

^[1] The campaign was a massive success, winning a Singapore Media Award for Best Use of Radio ^[1] and also helped SingTel garner a 30% increase in Youth Plan Signups and a 45% increase in positive online buzz. ^[1]

Recognized as perhaps the most energetic radio personality in Singapore, JK has interviewed stars like Mel B of the Spice Girls, ^[2] Simple Plan, ^[2] Evanesence, ^[2] YouTube Star Bethany Mota, ^[2] Olympic Champion Allyson Felix ^[2] and many more.

After almost 5 years hosting Power 98FM's Night Show, JK was promoted to Senior Radio Presenter.

Since March 2015 he has helmed the station's flagship Morning Radio Show along with co-host Michael Tan.

^[2]

JK proposed to his fiance, Vion Seng, on 26 March 2014, in a "How I Met Your Mother" video style proposal at a cinema in Cathay Cineleisure Orchard. ^[2]

They were married on 19 June 2015 at W Singapore Sentosa Cove.