Skip to main content

Security Council Members

The following are the current members of the Security Council; for information about the Security Council, see "Security Council Overview".

i. September Cohort

  1. gzeon is a smart contract engineer at Offchain Labs and a leaderboard warden and judge at Code4rena. gzeon has developed and maintained major components of the Arbitrum smart contract codebase and has contributed to resolving critical blockchain security incidents.
    • 0xe2e9d5B97d8C0457B1cf80BC93802bce4DF03e33
  2. Gauntlet is a DeFi quantitative research firm, represented by Ryan Wegner (Head of Security). Gauntlet specializes in data-driven treasury and risk management, mechanism design, vulnerability analysis, proactive threat identification, and incident response. Gauntlet also serves on the Security Councils for Scroll and Polygon.
    • 0xf8d47784EE7F3eBD40Bd83CB822e3161742B1988
  3. Emiliano Bonassi is the Rollup Engineering Lead at Conduit. Emiliano has identified and responded to multiple security emergencies, and developed open-source security tools. Emiliano also serves on the Optimism Security Council, the Sherlock Protocol Claims Committee, and is a founding member of Seal911.
    • 0x33ddb82e68940f0e4C1050885BcE8faF5Ddd1b93
  4. Immunefi is a blockchain security firm and Web3 bug bounty platform, represented by Alejandro Munoz-McDonald (Senior Security Researcher). Immunefi has run more than 500 bug bounty programs—including an Arbitrum bug bounty program since August 2021—and has prevented over $25B in potential hacks across more than 300 projects.
    • 0x0cd9e52891A0a48d45b0C61A31086be8361Ef157
  5. zachxbt is an independent researcher, a Paradigm incident response advisor, and a member of the Polygon Protocol Council. zachxbt has recovered more than $250M for victims of cybercrime through investigations and on-chain forensics across smart contract exploits.
    • 0x875573B973F7E9Ca54eb34a59180C70eE1128208
  6. Griff Green is the founder of Giveth, the White Hat Group, and several other Ethereum public goods platforms. Griff has extensive experience in blockchain crisis response, including helping remediate The DAO and Parity multisig incidents. Griff also serves on the ENS Security Council and the Gnosis Bridge multisig.
    • 0x882c6FCb3D358b9d70B97c6999159cea64168B6F

ii. March Cohort

  1. Bartek Kiepuszewski has been a blockchain architect at MakerDAO since 2017. He also co-founded l2beat.com and TokenFlow Insights. Bartek holds a PhD in computer science from Queensland University of Technology.
    • 0x0275b3d54a5ddbf8205a75984796efe8b7357bae
  2. Michael Lewellen has security expertise in smart contracts, governance and incident response, and is currently the Head of Solutions Engineering at Blockaid. They co-authored the Security Council Best Practices guide and managed high-profile audits during his time at OpenZeppelin, and continues to develop Web3 security standards.
    • 0xBBD2E01eFB88ce00F8f5b6B9a696966070089392
  3. Yoav Weiss is a security researcher at the Ethereum Foundation and has been building in the Ethereum space since 2017, working on account abstraction (ERC-4337), OpenGSN, L2 security, etc. Yoav brings over 25 years of experience and has developed security technologies used by industry leading companies.
    • 0x475816ca2a31D601B4e336f5c2418A67978aBf09
  4. fred is the former Tech Lead at both Offchain Labs and the Arbitrum Foundation and cares about the long-term success and security of the Arbitrum ecosystem. They have read the entire Arbitrum codebase multiple times, written significant parts of it, and has worked on countless engagements (i.e. audits) with security professionals across the industry.
    • 0xD8D4cEC103c0B6d7166405F0EbD7087C75a1528E
  5. Certora are experts in smart contract formal verification and have formally verified the EVM bytecode of a range of applications for whom security is paramount, Certora is motivated to contribute to developing safe digital and financial infrastructure built on Arbitrum. Organization represented by Elad Erdheim.
    • 0xeEe3Fb3B792C7DDbB6aEF0C440FBC621f4d6fe2D
  6. OpenZeppelin's mission is to secure the decentralized web. By combining their vast experience across DAOs and protocols, comprehensive security solutions, and a community-first approach, OpenZeppelin is uniquely positioned to contribute significantly to Arbitrum's security and governance. Organization represented by Steven Thornton.
    • 0x9316ca66f5f936E3239e4fD2AAAEA5C7b6f3C4cC