Dennis sabatino

Coordinate and execute cybersecurity operational activities, including managing initiatives to address and remediate OT security vulnerabilities. Perform detailed cybersecurity risk assessments on OT/ICS systems, developing tailored mitigation strategies to align with organizational compliance and risk tolerance.

Led OT security assessments and vulnerability analyses across critical infrastructure sectors including water, energy, oil & gas, and transportation, with a focus on practical mitigation strategies. Designed and implemented secure network architectures, segmentation, firewall configurations, and access controls tailored to OT environments.

Designed and implemented secure OT network architectures, including segmentation strategies and access controls to protect critical infrastructure. Led IEC 62443 risk assessments at multiple U.S. manufacturing sites, identifying vulnerabilities and advising on mitigation strategies aligned with NIST 800-82.

Deployed Armis OT security platform across customer environments, enabling comprehensive asset discovery, vulnerability tracking, and real-time visibility into OT networks. Collaborated with cross-functional teams to improve situational awareness, reduce risk exposure, and align security policies with frameworks like NIST, IEC 62443, and ISA99.

Led a 50-member global technical team supporting IAM systems for a multinational banking client, coordinating efforts across multiple time zones. Oversaw integration and optimization of Aveska, PAM, and PUMP platforms for over 300 financial vendors, improving access control and efficiency.

Conducted in-depth security assessments of ICS/SCADA systems, identifying vulnerabilities and threats using NIST 800-82, ISA99, and IEC 62443 frameworks. Designed and implemented standardized security policies, procedures, and incident response plans to strengthen OT cybersecurity posture and preparedness.

Led a global IT/OT task force at ExxonMobil to assess and secure 2,700+ ICS-connected systems, aligning all critical assets with cybersecurity standards and reducing risk exposure. Designed and deployed a secure database and automated workflows to manage system connection data, cutting manual entry time by 50% and enhancing attack surface visibility.

Secured external network and third-party connections to ExxonMobil’s ICS/SCADA environments, validating connectivity and enforcing cybersecurity standards across multi-phase initiatives. Led site assessments and physical walkthroughs to identify vulnerabilities in legacy ICS systems, providing actionable mitigation strategies aligned with corporate risk reduction goals.

Led global OT/IT network security projects at ExxonMobil, securing over 400 firewalls and external connections across critical infrastructure sites worldwide. Managed firewall certification processes, updated ACLs, and ensured policy compliance across regions including North America, Europe, and Australia.

Led cybersecurity architecture efforts for ExxonMobil’s IT and OT environments across 8 countries, delivering secure, scalable solutions and managing global strategy execution. Executed large-scale migrations from Forefront Threat Management Gateway (TMG) to Forcepoint appliances and integrated Zscaler for advanced endpoint detection and response, improving security and access control.

Delivered Tier 2/3 technical support for global customers utilizing Forcepoint cybersecurity solutions. Conducted in-depth troubleshooting and incident response across appliances and software platforms.

Completed a Bachelor of Science with a concentration in Computer Information Systems. This program provided a strong foundation in information technology and systems.