Kisub is currently the Chairman of the Board of Mirakle51 which is a unique service platform for early-to-mid stage ventures and provides reevaluation, reassessment, diagnosis and treatment via in-field experts, mentors, EIR (entrepreneur in residence) and partnership networks.

He has been the Founder and CEO of Kainos Medicine since 2007.

He was the special partner and an investment advisor to Altos Venture, a US-based $200M investment firm from 2003 to 2007.

Between 2003 and 2007, he was the Founder and CEO of GCT Semiconductor Inc., USA which manufactured RF-Base Band, a key component in mobile communications technology, with operations in Silicon Valley and a 200-staff R&D center in Seoul.

He co-founded Silicon Image Inc., USA in 1994 and successfully managed its IPO listing on the NASDAQ in 1999.

Prior to this, he also successfully founded his semiconductor distribution company in the USA and represented multiple US-manufactured products for export to Korea.

He also held various management positions at Hanwha Engineering & Construction and Hyundai Engineering & Construction.