Gregory Ellis

Background

About Gregory Ellis

I’m a cybersecurity and infrastructure leader with a proven track record driving security modernization, cryptographic transformation, and cloud resilience across complex enterprise environments. Trusted and recognized for delivering secure, scalable digital identity and encryption strategies, I lead large-scale initiatives in PKI, IAM, zero trust, and certificate lifecycle management—helping organizations modernize critical infrastructure and prepare for quantum-ready futures. Currently at Walmart Global Tech, I lead enterprise cryptographic systems and secure cloud adoption across AWS, GCP, and Azure. I guide transformation efforts that reduce risk, enhance availability, and enable secure-by-default architecture at scale. Previously at Deloitte, I spent extensive tenure advancing global technology operations—modernizing infrastructure, implementing resilient systems, and building cross-functional partnerships that powered client and firmwide success. I’m not just a business-first leader—I’m a people-first leader. I build high-performing teams, foster alignment across security and engineering, and translate complex needs into clear, actionable strategies. As security and resilience become boardroom priorities, I focus on building organizations that are ready for what’s next.