Simon Chassar

CRO / CxO - GTM Transformational Leader | Cybersecurity, AI and IOT | Portfolio Cybersecurity or GTM Advisor | Change & Growth Management | SaaS and Cyber Sales EVP | Advisor NonExec | Investor | Speaker

📍 United Kingdom🔄 Updated September 2026💼 3 investments📅 2 years investing🗓 Last invested May 2025
VC🌍 United Kingdom
3
Total investments
1
Early stage
1
Mid stage
0
Late stage
2y
Years active

Portfolio

3 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Seed Investor
May 2025
Rilevera is the Detection Engineering platform that brings CI/CD, validation, and visibility to every detection. - CISOs get assurance that detections are working, documented, and aligned to risk. - SOC managers get clarity into what’s deployed, how it’s performing, and where the gaps are. - Detection engineers get a real workflow—with version control, testing, and feedback loops built in. Rilevera turns detection engineering from a guessing game into a system of record.
Seed Investor
Feb 2025
DER Security was founded in 2022 as a spin-off of the SunSpec Alliance, a trade alliance of solar and storage distributed energy industry participants. With leadership originating from the SunSpec Alliance, Sandia National Labs, and the Cybersecurity industry, the DERSec team is delivering the worlds first cybersecurity protection, detection, and response software products for interoperable DER devices and systems.
Seed Investor
Feb 2024
Frenos is the first AI-native OT penetration testing platform, purpose built for critical infrastructure, defense, and industrial control environments. We enable organizations to safely and continuously test the defensibility of their operational technology without touching production systems. Our platform combines digital twin modeling, AI adversary reasoning, and attack path simulation to uncover real-world exposures, validate controls, and prioritize mitigations all without disruption. By emulating the tactics, techniques, and procedures (TTPs) of nation-state and ransomware actors, Frenos reveals exactly how adversaries could move through your OT environment and what defensive actions matter most. Built by OT security experts and offensive practitioners, Frenos empowers red teams, blue teams, and CISOs to shift from periodic assessments to continuous validation moving beyond visibility to measurable resilience. Whether deployed as a laptop-based assessment tool or an enterprise-grade continuous red teaming platform, Frenos delivers the automation, consistency, and insight needed to stay ahead of modern OT threats.
Experience · 8 entries
All (8)
Investments (3)
Founder (1)
2025
Membership Associate
Sep 2025
The Royal United Services Institute (RUSI) is a unique institution, founded in 1831 by the Duke of Wellington, RUSI embodies nearly two centuries of forward thinking, free discussion, and careful reflection on international affairs and defence and security matters. RUSI is a British institution but operates with an international perspective. Offices in Nairobi and Brussels reinforce our global reach. Over the years, we have amassed an outstanding reputation for quality and objectivity. Our heritage, location at the heart of Whitehall, and extensive networks inside and outside government, give RUSI a unique insight and authority.
OT Security Advisor
Sep 2025
Partners Group is a global private markets firm with USD 185 billion in assets under management and c. 2,000 professionals across 24 offices worldwide. We seek to generate superior returns through capitalizing on thematic growth trends and transforming attractive businesses and assets into market leaders. As a committed, responsible investor, we aim to deliver lasting, positive impact for all our stakeholders. We provide an innovative range of bespoke client solutions to institutional investors, sovereign wealth funds, family offices and private individuals globally. Partners Group has been listed on the SIX Swiss Exchange since 2006 (symbol: PGHN).
Interim Chief Operating Executive
Jun 2025
e2e-assure is the UKs leading specialist in Managed Threat Detection and Response through our 24/7/365 UK owned and operated Security Operations Centre (SOC). Using our 10+ years of expertise, we have an SLA promise to detect critical threats (MTTD) in under 15 minutes and respond (MTTR) in under 30 minutes. e2e-assure abstracts away all unnecessary complexity from communication channels and empower your teams with clear, understandable and actionable knowledge, giving you the advantage in protecting your business against cyber threats. 
Seed Investor
May 2025
Rilevera is the Detection Engineering platform that brings CI/CD, validation, and visibility to every detection. - CISOs get assurance that detections are working, documented, and aligned to risk. - SOC managers get clarity into what’s deployed, how it’s performing, and where the gaps are. - Detection engineers get a real workflow—with version control, testing, and feedback loops built in. Rilevera turns detection engineering from a guessing game into a system of record.
Seed Investor
Feb 2025
DER Security was founded in 2022 as a spin-off of the SunSpec Alliance, a trade alliance of solar and storage distributed energy industry participants. With leadership originating from the SunSpec Alliance, Sandia National Labs, and the Cybersecurity industry, the DERSec team is delivering the worlds first cybersecurity protection, detection, and response software products for interoperable DER devices and systems.
Show all 8 entries ↓
Investment activity
2024–2025 · 3 investments
2024120252
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