William Kilmer

Venture Investor | Company Builder | Best-Selling Author of Transformative | Innovation Strategist

📍 Washington DC-Baltimore Area, United States🔄 Updated September 2026💼 8 investments📅 20 years investing🗓 Last invested Jul 2021𝕏 @upgrade_to_unlock
VC🌍 United States
8
Total investments
1
Early stage
2
Mid stage
3
Late stage
20y
Years active

Portfolio

7 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Board Member
Jul 2021
Oomnitza offers the industry’s most versatile Enterprise Technology Management platform that delivers key business process automation for IT. Our SaaS solution, featuring agentless integrations, best practices and low-code workflows, enables enterprises to quickly achieve operational, security and financial efficiency leveraging their existing endpoint, application, network infrastructure and cloud infrastructure systems. We help some of the most well-known and innovative companies to optimize resources, mitigate cyber risk, expedite audits and fortify digital experience. Read more about what our customers have to say about us on our G2 page at: https://www.g2.com/products/oomnitza/reviews. Discover what Oomnitza can do for you! Get in touch with us at: https://www.oomnitza.com/contact-us/ or send us an email at Team_Oomnitza@oomnitza.com, or give us a call (866) 985-0557. We are hiring! Check out our careers page: https://www.oomnitza.com/careers/ We look forward to connecting soon!
Board Member
Jun 2020
Blue Cedar makes it easy to secure mobile apps. Delivered through the Blue Cedar Platform, a CI/CD friendly SaaS solution, Blue Cedar app security provides multi-layer app defenses to create self-protecting apps. The Blue Cedar Platform orchestrates the unique app release activities, such as no-code inclusion of Blue Cedar or third-party app security controls, app signing and app distribution, that are needed to succeed in the world of mobile. Customers rely on Blue Cedar to streamline the last mile of mobile app deployments and automate the process of protecting mobile apps and mobile app data. Founded in 2016, Blue Cedar is funded by leading venture capital firms and is headquartered in San Francisco. For more information, visit www.bluecedar.com.
Board Member
Mar 2020
Synack’s Penetration Testing as a Service platform manages customers’ attack surfaces by discovering new assets, pentesting for critical vulnerabilities and gaining visibility into the root causes of security risks. We are committed to making the world more secure by harnessing a talented, vetted community of security researchers to deliver continuous penetration testing and vulnerability management, with actionable results. Synacks PTaaS platform has uncovered more than 71,000 exploitable vulnerabilities to date, protecting a growing list of Global 2000 customers and U.S. agencies in a FedRAMP Moderate Authorized environment.
Board Member
May 2019
Hazelcast modernizes applications with a unified real-time data platform to act instantly on streaming data to create new revenue streams, mitigate risks and operate efficiently. Top brands trust Hazelcast to simplify real-time architectures for next-gen applications requiring high-performance at scale, security, and resilience. Unlock instant action. Visit www.hazelcast.com.
Board Member
Apr 2019
Constella Intelligence is a global leader in identity risk intelligence. We help organizations detect, investigate, and respond to threats linked to exposed personal data — across the surface, deep, and dark web. With the world’s largest breach and infostealer data lake — spanning 1 trillion+ attributes across 125+ countries and 50+ languages — Constella delivers the visibility security and fraud teams need to strengthen identity posture, power threat intelligence, and reduce digital risk.
Board Member
Apr 2019
4iQ and Alto Analytics have joined to become Constella Intelligence. Visit constellaintelligence.com to learn more. Constella Intelligence is a leading global Digital Risk Protection business that works in partnership with some of the world’s largest organizations to safeguard what matters most and defeat digital risk. Its solutions are broad, collaborative and scalable, powered by a unique combination of proprietary data, technology and human expertise—including the largest breach data collection on the planet, with over 100 billion attributes and 45 billion curated identity records spanning 125 countries and 53 languages.
Board Member
Mar 2018
Haven Cyber Technologies was set up to achieve the vision created by the founder of C5 Capital – a technology investment firm with focus on high growth cyber security companies – to build the leading pure play cyber security provider in Europe. The founder, management team and strategic partners of C5 Capital are convinced that the fragmented cyber security markets in Europe does not efficiently serve the security needs of organizations. With countless companies offering individual security products and services without support or direction, Haven Cyber Technologies meets this need to guide and invest in the market. Our mission is to support organizations with comprehensive and high-quality cyber security, meeting and exceeding their business goals by helping them protect their IT infrastructure, communication and sensitive data both in the cloud and on site.
Experience · 14 entries
All (14)
Investments (8)
Board (8)
2023
General Partner, Head of GALLOS Ventures
Aug 2023
GALLOS Technologies (www.gallostech.io) builds and invests in early-stage (pre-seed through to Series B) security, defence & resilience technology companies. Focus sectors are cybersecurity, artificial intelligence, data analytics, sensors, and autonomous systems (UAVs). The GALLOS team supports the companies it invests in by bringing unique security, science & technology and commercial optimisation expertise, underpinned by highly connected, patient capital at scale. GALLOS has assembled a world-class team with decades of Nation State level security experience as well as deep investment and commercial optimisation know-how. GALLOS has several valuable differentiators. Key amongst these is the team’s unique view of security which gives GALLOS an equally unique view of the technologies which can be brought to bear to help commercial and governmental clients manage the systemic security challenges they face. And the company enjoys privileged access to unique deal flow and highly expert human capital thanks to our deep connectivity within the security establishment networks in the UK and US especially. GALLOS is on the hunt for high potential companies to support. If you’re a security technology company at pre-Seed through to Series B and you’re looking for a co-building investor and partner to help give you strategic advantage, we look forward to hearing from you. Contact us today at info@gallostech.io.
2021
Board Member
Jul 2021
Oomnitza offers the industry’s most versatile Enterprise Technology Management platform that delivers key business process automation for IT. Our SaaS solution, featuring agentless integrations, best practices and low-code workflows, enables enterprises to quickly achieve operational, security and financial efficiency leveraging their existing endpoint, application, network infrastructure and cloud infrastructure systems. We help some of the most well-known and innovative companies to optimize resources, mitigate cyber risk, expedite audits and fortify digital experience. Read more about what our customers have to say about us on our G2 page at: https://www.g2.com/products/oomnitza/reviews. Discover what Oomnitza can do for you! Get in touch with us at: https://www.oomnitza.com/contact-us/ or send us an email at Team_Oomnitza@oomnitza.com, or give us a call (866) 985-0557. We are hiring! Check out our careers page: https://www.oomnitza.com/careers/ We look forward to connecting soon!
2020
Board Member
Jun 2020
Blue Cedar makes it easy to secure mobile apps. Delivered through the Blue Cedar Platform, a CI/CD friendly SaaS solution, Blue Cedar app security provides multi-layer app defenses to create self-protecting apps. The Blue Cedar Platform orchestrates the unique app release activities, such as no-code inclusion of Blue Cedar or third-party app security controls, app signing and app distribution, that are needed to succeed in the world of mobile. Customers rely on Blue Cedar to streamline the last mile of mobile app deployments and automate the process of protecting mobile apps and mobile app data. Founded in 2016, Blue Cedar is funded by leading venture capital firms and is headquartered in San Francisco. For more information, visit www.bluecedar.com.
Board Member
Mar 2020
Synack’s Penetration Testing as a Service platform manages customers’ attack surfaces by discovering new assets, pentesting for critical vulnerabilities and gaining visibility into the root causes of security risks. We are committed to making the world more secure by harnessing a talented, vetted community of security researchers to deliver continuous penetration testing and vulnerability management, with actionable results. Synacks PTaaS platform has uncovered more than 71,000 exploitable vulnerabilities to date, protecting a growing list of Global 2000 customers and U.S. agencies in a FedRAMP Moderate Authorized environment.
2019
Board Member
May 2019
Hazelcast modernizes applications with a unified real-time data platform to act instantly on streaming data to create new revenue streams, mitigate risks and operate efficiently. Top brands trust Hazelcast to simplify real-time architectures for next-gen applications requiring high-performance at scale, security, and resilience. Unlock instant action. Visit www.hazelcast.com.
Show all 14 entries ↓
Investment activity
2006–2021 · 8 investments
2006120181201932020220211
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