Stephen Mathezer is an accomplished cybersecurity leader with over two decades of experience in securing critical infrastructure and operational technology (OT) environments. As Vice President of Service Delivery & Innovation at iON United, he leads the design, execution, and evolution of cybersecurity services that help organizations navigate complex digital threats.
Stephen is one of a select few professionals worldwide to hold the GIAC Security Expert (GSE) designation—GIAC’s highest certification—and is a SANS Certified Instructor, known for his expertise in ICS/OT security, penetration testing, and risk management. His hands-on approach and commitment to continuous learning have made him a trusted advisor to clients across critical sectors.
A passionate advocate for team empowerment and innovation, Stephen brings a unique blend of technical depth and leadership insight to every engagement. He is dedicated to fostering resilient cybersecurity programs that align with business goals and regulatory requirements.
