Sounil Yu
CTO at Knostic
Reston, Virginia
Overview
Work Experience
Chief AI Safety Officer
2023 - Current
Book Author
2019
Wrote a book on the Cyber Defense Matrix. I continue to speak and advise on its usage. I also continue to capture test use cases from other practitioners that have implemented the Cyber Defense Matrix.
Faculty
2019
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
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.