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Sounil Yu

CTO at Knostic

Reston, Virginia

Overview 

Sounil Yu is the Co-Founder and CTO of Knostic in Reston, Virginia, with a background in network security, penetration testing, and information security management. Noteworthy highlights of his career include serving as a Fellow at the National Security Institute and holding advisory roles at RealCISO.io and Strategic Cyber Ventures.

Work Experience 

  • CTO

    2023 - Current

  • Villager

    2022

    The Team8 CISO Village is a global community of cyber security senior executives, CISOs, and thought leaders from leading enterprises. The Village is an avenue for exchanging ideas, collaborating as an industry, and promoting innovation in cyber security.

Team8 Capital is a new venture capital vehicle leading investments in early stage enterprise technology and fintech startups.

  • Venture Advisor

    2019

  • CISO-in-Residence

    2020 - 2021

    YL Ventures funds and supports brilliant Israeli tech entrepreneurs from seed to lead. Based in Silicon Valley and Tel Aviv, YL Ventures manages over $300 million and exclusively invests in cybersecurity. YL Ventures accelerates the evolution of portfolio companies via strategic advice and U.S.-based operational execution, leveraging a powerful network of Chief Information Security Officers and global industry leaders. The firm's track record includes successful, high-profile portfolio company acquisitions by major corporations including Palo Alto Networks, Microsoft, CA, and Proofpoint.

YL Ventures funds and supports seed-stage entrepreneurs in the cybersecurity sector.

  • Investor

    2021

    Valence is a Business Application Mesh security company, focused on managing the risks from third-party integrations and securing app-to-app connectivity in the modern business environment. Valence’s platform applies zero trust principles to the Business Application Mesh, a complex network of applications interconnected by APIs and hyperautomation workflows, to deliver comprehensive visibility into the risk surface, reducing unauthorized access and preventing critical data loss. With Valence, organizations get a clear view of the Business Application Mesh and a clear path to control, govern and secure it. For more information, visit www.valencesecurity.com.

Valence enables organizations to find and fix SaaS risks, with comprehensive SSPM, threat detection, and risk remediation.

Raised $32,000,000.00 from Porsche Ventures, Akamai Technologies, M12 - Microsoft's Venture Fund, YL Ventures, StoneMill Ventures, Alumni Ventures and Michael Fey.

  • Advisor

    2020

    An easy-to-use and guided cloud platform to help companies understand, manage, and mitigate their cyber risk. Built on NIST, Critical Security Controls Top 20 and recognized open standards to identify issues and immediately access a curated marketplace to procure the right solutions to address those gaps. My goal is to incorporate many of the use cases of the Cyber Defense Matrix into RealCISO.

  • Investor

    2020

    Toucan is a platform designed to host virtual social events. Whether you're holding a casual get-together or a company happy hour, Toucan offers the space and functionality for fun and substantive social interaction. It is designed to both closely mimic and even improve upon in-person large-scale social gatherings. With Toucan, you are able to have more intimate conversations within a larger event space with whomever you would like. You are the agent of your own social experience. Instead of being forced into one large video conference, our dynamic interface allows you to move in and out of smaller groups so that you can chat with your best buddies, reconnect with old friends, and make new connections. With Toucan, the days of socializing over rigid video conferencing tools made for workplace collaboration are over. It is time for a platform that brings you the ultimate social experience.

  • Investor

    2020

    Building the world's first open and adaptable email security platform.

  • Investor

    2020

    GreyNoise collects and analyzes untargeted, widespread, and opportunistic scan and attack activity that reaches every server directly connected to the Internet. Mass scanners (such as Shodan and Censys), search engines, bots, worms, and crawlers generate logs and events omnidirectionally on every IP address in the IPv4 space. GreyNoise gives you the ability to filter this useless noise out.

GreyNoise is a cybersecurity company that analyzes Internet scanning traffic to separate threats from background noise.

Raised $20,400,000.00 from Paladin Capital Group, Radian Capital, Inner Loop Capital, CRV and StoneMill Ventures.

  • Advisor

    2020

Strategic Cyber Ventures is the industry’s first investment vehicle for synergistic cybersecurity technologies.

Education 

Articles About Sounil

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