About Us

Changing the way people think about cybersecurity.

GRA Quantum is a pioneering information security firm founded upon the belief that every organization has the right to keep their data private and secure. Our mission is to build close partnerships with our clients, serving them not as just a vendor but as trusted advisors helping them to build effective, proactive plans. Our focus is always on both the technical and human elements within an organization. We believe in comprehensive strategies designed to harden networks, deflect attackers, and rapidly recover from any incidents. As technology progresses, so too do our tactics, ensuring our experts are always prepared to serve forward-looking leaders eager to stay ahead of emerging threats.

GRA Quantum is a wholly-owned subsidiary of Global Risk Advisors.

Our Team


Kevin Chalker

Founder & CEO / New York

After almost two decades of work in academia, government, and diplomacy, Kevin decided to channel his talent and energy into breaking new ground in the private sector. He crisscrosses the planet deepening GRA Quantum’s strategic partnerships, maintaining client relations, and guiding overall business development. When not running at 110mph, he’s honing his technique in Brazilian jiu-jitsu or sitting in the bleachers at one of his sons’ little-league games.

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Thomas Boyden

President / Silicon Valley

Tom’s been fighting cybercrime for over a decade, having spent his career in the private sector and US government. He develops partnerships with Silicon Valley’s leading technology firms and cultivates relationships with corporate information security and technology officers. In between his travels, he tries to squeeze in an NBA game or two—especially when the Golden State Warriors are playing.

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David Powell

Managing Director / UK & Europe

Dai developed firsthand experience handling cyber operations during his twenty-two-year career in the British Army. He oversees GRA Quantum’s client relations and business development efforts in the United Kingdom and Europe. He is a keen off-road motorbike rider and racer with numerous international trials and endurance races under his belt.

Advisory Board

Rick Orloff

VP, CSO, CPO / Code42

Rick Orloff is a Vice President, the Chief Security Officer (CSO), and the Chief Privacy Officer (CPO) at Code42, a real-time data recovery firm with a number of Fortune 500 clients. Before Code42, Rick was Chief Information Security Officer (CISO) at online auction giant eBay and Senior Director of Information Security and Security Operations at Apple. Rick has sat on the advisory boards of Raytheon Cyber Products, Area 1 Security, Box Inc., and Oracle.

Matthew Waxman

Liviu Librescu Professor of Law / 
Columbia Law School

Matthew Waxman is the Liviu Librescu Professor of 
Law at Columbia Law School, where he chairs the national security law program. An expert in national security and international law, he previously served in senior positions 
at the US Departments of State and Defense 
and the National Security Council. He is a member of the Council on Foreign Relations, and he is also a Co-chair 
of the Cybersecurity Center at the Columbia Data 
Science Institute.

GRA Quantum's Top Talent

John Sabin

Senior Director, Network Security & Architecture / Silicon Valley

An eleven-year veteran of the US government, John boasts a tremendous record of technical expertise across a range of subjects, including offensive network operations, target tracking, and reverse engineering. He oversees GRA Quantum’s technical staff and is the chief technical consultant for client/partner relations. He’s a thrill seeker that spends his weekends scaling mountains and paragliding.

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Chris Foster

Director of Global Vulnerability Management / Silicon Valley

Chris has over twenty years of experience securing data networks, client-server systems, and web-based businesses. He specializes in penetration testing and applies his hacker mindset with today’s technologies to ensure a secure computing environment. When Chris isn’t helping organizations secure their computing assets, he can be found hunting, fishing, and just enjoying nature in general.

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Bart Holzer

Director of Incident Response & Forensics / Silicon Valley

Bart worked for the US government for almost twenty years, serving in an operational unit within federal law enforcement.  He combines expertise in network engineering and cybersecurity with skills in case management, communications, and legal compliance.  Bart can often be found outdoors, either leading a Pack of Cub Scouts or teaching his kids to bait their own hooks.

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