Nathan Keltner, CTO and Cofounder

Nathan Keltner leads, executes and coordinates advanced, custom-scoped projects for Atredis Partners. Nathan’s primary focus includes hardware reverse engineering and penetration testing, red teaming, protocol analysis and private vulnerability research.


Nathan has nearly a decade of experience in the information security industry, beginning his security career performing penetration tests, web application and secure configuration assessments on an internal team at a Fortune 500 retail corporation. Nathan expanded his career in consulting and spent much of the last seven years focusing on red team penetration testing, exploit development and software and hardware reverse engineering. Nathan most recently was a Senior Research Scientist with Accuvant’s Applied Research team.

Nathan has also worked extensively as a penetration tester, helping design penetration testing methodologies and workflows as well as leading complex red-team, social engineering, attack simulation and, numerous reverse engineering and binary analysis projects.

Nathan has performed research and exploitation assessments, including reviews of complex custom RF and ZigBee smart grid infrastructures, 802.15.4 and serial retail networks, multi-function ATM hardware and software, PIN entry devices, IPTV, VoIP hardware and software stacks, and modern networking access controls and identity management systems.

Key Accomplishments

Nathan is publicly best known for his research related to reversing proprietary Smart Grid radio frequency systems and other Smart Grid research, his contributions to the Metasploit Framework and as the founder of the SecTulsa security group in Tulsa, OK.

Nathan has spoken at Black Hat USA on researching and exploiting smart grid radio frequency systems, advanced analysis of purpose-built system-on-chip architectures, and exploitation under limited-access user security models on the Windows platform.

Nathan holds a Bachelor of Business Administration degree in Management Information Systems from the University of Oklahoma, holds a number of information security and audit certifications, and has been a frequent presenter at national and international security industry conferences.