Dan Guido
Co-Founder & CEO at Trail of Bits
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolDan Guido is a cybersecurity entrepreneur and technologist with 13+ years leading Trail of Bits, a research-driven security firm he co-founded that now employs 140+ engineers focused on cryptography, AI, and blockchain defense. As CEO he has translated deep technical expertise—ranging from reverse engineering and exploit development to DevOps work on widely used open-source projects like Algo VPN—into products, competition finalists (DARPA Cyber Grand Challenge, AIxCC), and a culture recognized among NYC's best places to work. He spun out iVerify to commercialize mobile spyware detection and advises startups, government agencies, and policymakers on emerging tech risk, including service on CFTC advisory committees. An early educator and organizer, he taught 300+ students at NYU, founded THREADS and Empire Hacking (1,800+ members), and maintains hands-on involvement in open-source security tooling. His background blends federal and financial-sector incident response with entrepreneurial investing across security, blockchain, and climate/health startups. He’s also pursuing executive education at Harvard Business School while supporting the next generation through scholarships at his alma mater.
13 years of coding experience
7 years of employment as a software developer
Johns Hopkins Center For Talented Youth (CTY)Bachelor's Degree, Computer Science, Bachelor's Degree, Computer Science at New York University - Polytechnic School of EngineeringOPM 65, OPM 65 at Harvard Business School
Stackoverflow
1,721reputation
120kreached
2answers
6questions
Github Skills (34)
ctf10
vpn10
vulnerability10
ipsec10
configuration-management10
keyv10
firewall10
c-programming10
c1110
iptables10
c1710
security-vulnerability10
ansible10
network-security10
vulnerabilities10
Programming languages (19)
Github contributions (5)
trailofbits/ctf
May 2014 - Dec 2017
CTF Field Guide
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:53 commits, 19 PRs, 24 pushes in 3 years 7 months
Contributions summary:Dan appears to be involved in a CTF (Capture the Flag) challenge related to network security. They have provided an initial commit and subsequently made changes to a C program designed to simulate a vulnerable network service. The changes include adding and modifying code, specifically related to authentication, and implementing actions such as adding a user, reading and writing articles, and executing commands. The user's modifications and inclusion of security-focused elements, suggests involvement in the discovery and exploitation of vulnerabilities.
ctffieldfield-guidesecurity-ctf
trailofbits/algo
May 2016 - Oct 2021
Set up a personal VPN in the cloud
Role in this project:DevOps Engineer
DevOps EngineerContributions:215 commits, 240 PRs, 422 pushes in 5 years 5 months
Contributions summary:Dan primarily focused on configuring and maintaining the VPN setup, including modifying the `ipsec.conf` and `sshd_config` files. They addressed issues and made improvements to the iptables rules (firewall) and integrated features like URL probes for Apple profiles, showing a deep understanding of the infrastructure. The user also focused on security enhancements by disabling DPD and preferring the Ed25519 key.
vpn-clientsecurityansibleikev2strongswan
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