Johnny has over 25 years in the entertainment industry, acquiring more than 300 credits to his name. Most notably known for his portrayal as Adam Park (Black Ranger, Green Zeo Ranger and Green Turbo Ranger) in the popular television series, Power Rangers but also for his voice over work in various anime and video game franchises (BLEACH, Akira, Marvel Ultimate Alliance, Naruto, Dragon Ball Z, Devil May Cry and Star Wars: The Old Republic).

Johnny is also an established musician and singer-songwriter, performing with his previous band Eyeshine and his current band Where Giants Fall.