Dug Song
Founder & Funder at Michigan Founders Fund
Ann Arbor, Michigan, United States
Summary
👤
Senior🎓
Top SchoolDug Song is a veteran security engineer and entrepreneur with 24 years building and scaling security products and companies, best known for co-founding Duo Security and leading its $2.35B acquisition by Cisco. He blends deep hands-on technical chops—from early kernel and protocol exploit work at university labs to contributing security fixes in open-source projects like duo_unix—with executive experience as Cisco Security’s Chief Strategy Officer and GM for Zero Trust. Based in Ann Arbor, he now invests locally, chairs multiple philanthropic and founder networks in Michigan, and runs Song United to amplify community-rooted innovation. Dug’s career is defined by translating rigorous technical insight into customer‑centric, high-growth SaaS businesses and industry standards (notably Zero Trust/NIST 800-207). A sometimes-surprising throughline is his long-running habit of shipping practical security tooling and research that later shaped commercial products and standards.
24 years of coding experience
27 years of employment as a software developer
B.S. Computer Science Liberal Arts, B.S. Computer Science Liberal Arts at University of MichiganJohns Hopkins Center For Talented Youth (CTY)
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (11)
security10
c1710
authentication10
unix10
c1110
sys10
nix10
openssl10
auth10
error-handling9
configuration-management8
Programming languages (2)
Github contributions (5)
duosecurity/duo_unix
Mar 2011 - May 2012
Duo two-factor authentication for Unix systems
Role in this project:
Back-end Developer
Back-end DeveloperContributions:202 commits in 1 year 2 months
Contributions summary:Dug focused on enhancing the security and robustness of the Duo two-factor authentication for Unix systems. Their contributions involved improving error messages, handling configuration issues, and synchronizing code between the login and PAM modules. Furthermore, the user addressed potential vulnerabilities by bailing on empty keys, which increased the overall security of the project.
unixpamyubikeysecurityauthentication
insomniacslk/libdnet
Oct 2001 - Sep 2010
Contributions:645 commits in 9 years
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