The September 2025 Security Council Election is finally complete!
The grace period has ended, which means the election results have been effectuated.
Who are the new Security Council members?
1. zachxbt
@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.
2. Griff Green
@griff 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.
3. Emiliano Bonassi
@emilianobonassi is the Rollup Engineering Lead at Conduit. Emiliano has supported more than 500 networks (including Orbit chains), actively identified and responded to multiple security emergencies—preventing over $10M in potential losses—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.
4. gzeon
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.
5. Gauntlet
@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.
6. Immunefi
@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.
You can see the full election results on Tally.
Election results have taken effect across relevant chains
The transactions below represent the respective updates to the relevant Security Council smart contracts:
- Arb One Emergency multi-sig
- Arb One Non-Emergency multi-sig
- Arb Nova Emergency multi-sig
- Ethereum Emergency multi-sig
Welcome and Thank You!
We extend a warm welcome to the newly elected and re-elected members, and a big thank you to all those who played their part in helping secure the Arbitrum ecosystem! 
