Christopher Day
Vice President, Strategic Capabilities And Programs, And Deputy CTO At Tenable
Columbia, Maryland, United States
Summary
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Senior🎓
Top SchoolChristopher Day is a veteran cybersecurity executive with more than 20 years of experience leading R&D, product, and operational teams across commercial and federal sectors, now serving as Vice President, Strategic Capabilities and Programs and Deputy CTO at Tenable. He combines deep hands-on vulnerability research—demonstrated by PoC exploits and RouterOS reverse engineering for multiple CVEs—with enterprise strategy and large-scale analytics expertise from roles building SOCs, threat-hunting centers, and petabyte-scale telemetry platforms. Christopher has led global engineering and research organizations, driven machine-learning and Zero Trust innovations, and delivered classified government programs and commercial product lines. Notably, his open tooling and exploit work (including Winbox parser debugging and exploit skeletons) reveal a rare blend of offensive technical depth and executive-level product stewardship. Based in Columbia, Maryland, he is skilled at turning advanced research into practical cyber exposure solutions and strategic Federal support.
9 years of coding experience
12 years of employment as a software developer
University of Miami
Github Skills (14)
routeros10
it-security10
network-security10
exploit10
reverse-engineering10
vulnerability-research10
python10
security10
cprogramming-language9
c-language9
honeypot8
scanner8
web-application-security8
udp7
Programming languages (3)
Github contributions (5)
tenable/routeros
Oct 2018 - Jan 2020
RouterOS Security Research Tooling and Proof of Concepts
Role in this project:
Security Engineer
Security EngineerContributions:25 commits in 1 year 3 months
Contributions summary:Christopher primarily contributed to the RouterOS security research tooling, focusing on analyzing and exploiting vulnerabilities within the RouterOS operating system. Their work involved reverse engineering the Winbox protocol, developing proof-of-concept (PoC) exploits for identified CVEs (including CVE-2019-3924, CVE-2019-3943, CVE-2019-13955, CVE-2019-15055, and CVE-2019-3981), and creating tools for analyzing network traffic and manipulating RouterOS behavior. The contributions included debugging Winbox parser logic, handling various edge cases like non-null-terminated passwords, and adding skeleton code to build more exploits.
scannerrouterosbughuntingsecurity-researchsecurity
tenable/poc
Sep 2018 - Jul 2019
Proof of Concepts
Role in this project:Security Engineer
Security EngineerContributions:23 commits in 10 months
Contributions summary:Christopher contributed exploits and proof-of-concept code related to security vulnerabilities. They developed exploits for multiple CVEs, including CVE-2018-1149, CVE-2018-15716, CVE-2018-1160, and CVE-2019-3948, targeting various network devices and web applications. The code includes detailed vulnerability descriptions, exploit implementations, and usage instructions, demonstrating a focus on penetration testing and vulnerability research.
vulnerabilitiesjavascriptjava-bytecodepocstatic-analysis
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