Randall S

Network Security Operations Leader-

Oracle • Fulltime

Apr 2025 - Jan 2026 • 9 mos

Provided L2/L3 operational support for enterprise firewall and secure access environments across global infrastructure Resolved P1/P2 incidents within strict SLA timelines, performing structured troubleshooting across firewall, VPN, and access layers Reviewed firewall logs and traffic behavior to identify root causes of access failures, misconfigurations, and policy conflicts Executed firewall changes including rule updates, NAT modifications, and secure access adjustments following approved change processes Worked from runbooks and SOPs to ensure consistent issue resolution and service delivery Participated in 24×7 on-call rotation, handling escalations and coordinating with cross-functional teams Performed structured escalation to L3 teams, providing detailed technical findings and troubleshooting steps Supported monitoring and alert response to ensure continuous platform availability and stability Fortinet FortiGate (Policies, NAT, VIPs, VPNs) Firewall Operations (Palo Alto, Check Point, Fortinet) Incident & Service Request Management (ITIL) TCP/IP, Routing, VPN Troubleshooting Log Analysis & Root Cause Identification SLA / OLA Adherence (Ticket-Based Workflows) Runbooks, SOPs, Escalation Handling Multi-Client MSP Support Environments Monitoring Tools (SolarWinds, SIEM, Alerts) Change Implementation & Firmware Upgrades Hands-on Network & Firewall Engineer with 10+ years of experience supporting high-volume, multi-tenant environments, specializing in incident resolution, firewall operations, and SLA-driven service delivery. Proven ability to operate in 24×7 MSP/NOC environments, resolving complex issues across firewall, VPN, and network layers using structured runbooks and ITIL-based processes. Known for rapid incident triage, clean escalation handling, and consistent SLA performance across customer environments. Strong background supporting Fortinet, Palo Alto, and Check Point firewalls, with deep understanding of policy flow, NAT, VPN

Lead Firewall and Network Engineer

AT&T • Fulltime

Feb 2020 - Nov 2024 • 4 yrs 9 mos

Supported multi-site enterprise firewall environments, resolving incidents and service requests across Palo Alto, Fortinet, and Check Point platforms Implemented firewall changes including: Rule creation & modification NAT & access policies VPN troubleshooting and support Monitored network and firewall alerts using enterprise monitoring tools, ensuring rapid response to service degradation or outages Troubleshot complex issues involving: Connectivity failures (LAN/WAN/VPN) Policy enforcement errors Routing and firewall rule conflicts Executed firmware upgrades and patching activities during maintenance windows Maintained accurate documentation in ticketing systems to ensure auditability and knowledge transfer Consistently met or exceeded SLA targets in high-volume ticket-driven environments

Infrastructure Operations Engineer

Banks • Fulltime

Aug 2019 - Jan 2020 • 5 mos

Proficiently utilized Cisco ISE for the production environment. Provide level 2/3 infrastructure support by quickly identifying/isolating incidents, while mentoring new engineers to support the customer network and to evaluate and determine the best alternative for the business. Engineered preventive solutions to enhance system resilience; coordinated with engineering teams to fortify core connections, successfully mitigating potential outages and ensuring uninterrupted service delivery, resulting in a 25% increase in customer satisfaction. • Troubleshoot Linux, Cisco UCS, HP servers, Cisco Nexus, and Meraki Switches, by using a layered approach to investigate the root cause. Saving the company Millions of dollars. • Training new Engineers and acting in a project management role. Provided new engineers with the required support to ensure the correct monitoring of the customer IT environment. • Analyzed Cisco's SD-WAN tool Vmanage. • Troubleshot Virtualization and VMware Servers and Workstations. Mentoring and managing engineers in all areas in compliance with the standard operating procedures. • Resolved failed network devices by troubleshooting layers 1-4, using OSPF and enabling BGP peer routing, using the management console on the server, and engaging the vendor for physical issues, product defects and enhancements. LAN/WAN Troubleshooting; used the follow the path troubleshooting approach alongside the divide and conquer approach. Troubleshoot by layers. • Directed the implementation of new phones onto the network by configuring the switch port for the voice VLAN, optimizing call quality and network performance for a large team of employees. Monitoring network, voice, and database systems, critical servers or devices by using Solarwinds, Netxms, and Zabbix. • Actively pursued problem-solving processes and 24x7 availability for the team and the customers. I have worked on Cisco Meraki, Palo Alto and Fortinet Devices.