Jinyoung Kwak

CEO / CTOJinyoung Kwak

Having a Masters degree in Computer Sciences from Griffith University, he worked as a software engineer and was among the developers of Cyrword, the first social network in Korea. Late on, he worked at Saycupid.com as CTO and was appointed an Adjunct Professor in the Department of Game Technology at the Korea Polytechnic University. He is regarded as a social network IT expert in solution (DB) Analysis & Design. Since 2015, he has been developing technologies related to SNS service based on distributed network and blockchain. He is the founder and CEO of Sigmachain and now is also serving as the CEO of Futurepia. In recognition of his services, he won the Blockchain Innovation Award at the Global Economic and Cultural Development Forum, Korea in 2018.

Dennis Oh

Vice President Dennis Oh

Having a bachelor's, master's and doctorate degree in Industrial Engineering from KAIST, he has a history of conducting dozens of successful mergers and acquisitions and have consulted more than 2000 enterprises. He was the representative director of Saving Bank and Nexus Investment Company and was the CFO of Modia and Netmarble as he helped them to be listed on KOSDAQ. He has the planning ability to develop business models and can help towards its horizontal and vertical expansion. Within Sigmachain, he has developed various blockchain business models and coin ecosystems.

Yongjun Hyung

CMOJangjun Yun

Jangjun Yun is the Sigmachain CMO, CEO of Doobe Co. Ltd., and Technical Adviser for Korea Software Industry Association. He was part of Shinhan Bank’s smart task force, where he gained extensive experience in building personal information management systems based on the blockchain. In addition, he has built a video evidence analysis system based on AI for the Police Agency. Jangjun was part of the team that participated in making of Big Data POC production center while working along with Google and LG Display. Moreover, he has built the Hyundai and Kia Motors g-CRM / GVOCM.

Dennis Oh

Head of Global SalesWilliam Hugo Yang

William is an entrepreneur, advisor and market research analyst. He focuses on ecommerce, video games and social network systems. Prior to joining Sigmachain, William worked in Samsung Electronics, a global handset and consumer electronics manufacturer. He worked inside the ‘Technology Strategy Group’ and ‘Global Service Partnership’ team. Before joining Samsung, William founded and led Unity Technologies Korea office. In this role, he was at the forefront of rapid-growth, and he led the team to deliver 300 percent year-over-year revenue growth and launched several new SaaS products. He started his career as a financial consultant at PricewaterhouseCoopers (Samil) Accounting firm specializing in M&A and corporate finance. William received a master’s degree in Political Science from Yonsei University and a bachelor’s degree in Sociology from Simon Fraser University.

Dongyoon Shin

CSODongyoon Shin

As an expert in business model commercialization, marketing and consulting, he has conducted marketing and web consulting services for 30 major companies specialized in internet such as Joins.com, Naver, Empas, etc. He also worked as a representative expert in tnternet field at Foxnet, founded online vaccine company Everyzone and led the company to the top of the industry. Also co-founded Kuku Communications Co., Ltd., secured the largest number of customers in the shortest time through the automatic address book “KukuBox” service. He served as the Chief Marketer at NHN Co., Ltd. He is currently serving as a marketing, distribution advisory board of the Rural Development Administration and also an advisory board member of the Bucheon Smart City Challenge Project.



Hosted the Daegu Blockchain Heatup
Participated in the 2019 Yeosu MegaBounx HipHop Festival
Established the branch office of Sigmachain in Saipan
Sigmachain mainnet was selected for "Busan Blockchain Regulation Free Zone"
Signed a business agreement with YBL (Yonsei Blockchain LAB)
Signed MoU with Vietnam's blockchain Shimex media for strategic alliance
Futurepia's listing on Digifinex Korea Exchange
Signed a business contract with the WelcomeDecent
Futurepia's IEO through BW Exchange Launchpad
Signed MoU with KUKY regarding blockchain business
Signed MoU with Publish regarding blockchain business
Signed MoU with Taekwon Block (Taekwondo Blockchain Ecosystem)
Sigmachain Network Alliance(SNA) Launched
Signed MoU with HANBITCO regarding blockchain business
Signed MoU with Aisa Blockchain Public Service Association regarding blockchain business
Signed MoU with Conun Korea regarding blockchain business
Signed MOU with TAHNK to supply mainnet
Signed MoU with Media Bean for the promotion of technology exchange
Signed MoU with Lfix regarding blockchain business
Signed MoU with BITONBAY regarding blockchain business


Signed MoU with "Smart Data Bank" regarding the cooperation of blockchain based small and medium enterprises.
Signed MoU with "Korea Medium and Small Industry Managers Association" regarding the cooperation of blockchain based small and medium enterprises.
Signed MoU with GS One World.com and Global O20 Platform based on GS1 Standard.
Signed contract with Monster Cube
Signed MoU with Linker Korea's BitNaru Exchange
Signed MoU with Bluebelt Korea regarding blockchain business
Signed MoU with MetaMorph
Participation in 'K-SWC 2019 ANSWER'
Participation in 2018 Blockchain Keyference
Participation in Gold Funds & Korea meetup
Participation in the Blockchain Leadership Summit, Switzerland (Won First Prize at Pitch deck competition)
Signed contract with Cadio Healthcare
Paticipation at WorldCryptoCon held in Las Vegas
Signed MoU with L.FIX to provide blockchain mainnet
Signed MoU with Metabuild for Construction of Block Chain-Based IOT/Smart City Services
Signed MoU with Blockchain Forum Korea
Signed MoU with Awasoft for the establishment of blockchain-based payment service
Signed MoU with Namu Technologies for the promotion of technology exchange
Signed contract with Neo Company - a Japanese cosmetics firm
KOLAS verified the results of Sigmachain V1.0 Test
Signed MoU with LIKER WORLD - a blockchain based educational content platform
Signed MoU with Wowsoft for building blockchain-based printout security solutions
Participation in K-BlockChain held at COEX, Seoul
Trademark registration (Application no. 40-2018-0099716)
Trademark registration (Application no. 40-2018-0099718)
Trademark registration (Application no. 40-2018-0099720)
Trademark registration (Application no. 40-2018-0099724)
Signed MoU with COWEYE SGPTE
Filed the patent application for DDPoS consensus algorithm (Application number 10-2018-0045957)
Won the Grand Prize at Global Economic and Cultural Development in 2018.


Development of Personal live streaming media servers

Starting R&D for blockchain algorithm


Launching the SNS application "Touch"


Launching Cloud Streaming Service "CANCAN"


Development of Real-Time Video Transmission Service for CCTV


Launching the development of SK Telecom CCTV Service "SMARTKEEPER"