About Sigma Prime

Mehdi Zerouali

Founder

Co-founder of Sigma Prime and one of the earliest security specialists to focus on Ethereum and decentralised systems. Mehdi earned his reputation auditing critical systems long before blockchain existed, bringing that same rigor to Ethereum in its earliest years. Today, he is best known for helping secure some of the industry's most important protocols and infrastructure, and for his ongoing contributions to broader ecosystem security initiatives, including Security Alliance (SEAL) and government regulatory discussions.

Adrian Manning

Founder

Co-founder of Sigma Prime, protocol engineer, and long-time Ethereum researcher. Adrian combines an academic background in theoretical physics with years of hands-on experience building and securing Ethereum infrastructure. His work has spanned Ethereum consensus, networking, protocol security, and client development, helping strengthen the resilience and security of critical blockchain systems.

Paul Hauner

Founder

Co-founder of Sigma Prime and Lighthouse. Paul leads the development of one of Ethereum's most widely used consensus clients, which today secures a significant portion of the Ethereum network. He is a strong advocate for client diversity, open-source development, and long-term network resilience, and his work has earned the respect of builders, validators, and institutions across the ecosystem.

Sean Anderson

Director

Director at Sigma Prime and a core contributor to Lighthouse. Sean has spent years working on the software that keeps Ethereum's consensus layer stable, secure, and resilient. His work spans client performance, consensus infrastructure, MEV, and block building systems, giving him practical experience operating and maintaining production Ethereum infrastructure at scale.

Kirk Baird

Director

Director at Sigma Prime and a security engineer known for his work reviewing complex blockchain infrastructure. Kirk has spent years assessing blockchain nodes, bridges, networking protocols, cryptographic systems, and zero-knowledge technologies. He has become a respected voice within the Ethereum security community through his public writing and conference talks, including guides on core node security reviews and presentations on bridge vulnerabilities and networking protocol risks.

Michal Knapkiewicz

Director

Director at Sigma Prime and a security engineer with over a decade of experience across blockchain security, penetration testing, red teaming, incident response, malware analysis, and reverse engineering. At Sigma Prime, Michal helps secure smart contracts, DeFi protocols, offchain systems, and blockchain infrastructure. He brings deep hands-on technical experience from high-value blockchain assessments, combined with years leading complex security consulting engagements at EY for major Australian and international organisations.