About CDX International LLC

Expert OT Cybersecurity Solutions Backed by 40+ Years of Real-World Engineering Experience

CDX International LLC delivers practical, engineer-first cybersecurity services to utilities, renewable energy operators, DoD facilities, water/wastewater systems, and other critical infrastructure owners. Founded in 2024 by Robert Sadler, we specialize in translating complex standards (NERC CIP, CISA Zero Trust, IEC 62443, NIST SP 800-82, RMF, and UFC-4-010-06) into operational reality — without disrupting production.

Why CDX International?

• Engineering-First Approach — We don’t just apply IT security tools to OT. We design solutions from the circuit and protocol level up.
• Hands-On Capabilities — Full OT penetration testing flyaway kits, digital twins, threat modeling (IriusRisk), rapid prototyping, and physical security testing (COVERT & C³ methods).
• Proven Compliance Expertise — NERC CIP (Low/Medium/High), NIST, IEC 62443, RMF, and CISA Zero Trust implementations that produce audit-ready evidence.
• Remote-First Delivery — Nationwide support with secure remote access capabilities.

Whether you need help maturing your OT security program, preparing for a NERC CIP audit, implementing micro-segmentation, building internal pen-testing capabilities, or designing resilient architectures, CDX International brings the battle-tested expertise critical infrastructure demands.

Our Mission

To protect the systems that power our world by combining decades of OT engineering knowledge with modern cybersecurity best practices — delivering resilient, compliant, and operationally efficient solutions.

Ready to Strengthen Your OT Security?

Book a no-pressure 15-minute discovery call with Robert Sadler to discuss your specific challenges with NERC CIP, CISA Zero Trust, penetration testing, or compliance.

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