Lead Network Security Engineer - Professional Security Services
Lumen Technologies INC, Oct 2019 – Present
- Configured and managed troubleshooting of new firewalls during hardware refresh initiative, handling various bugs which arose and facilitating communications between customer and vendor.
- Trained a new team of six engineers on day-to-day operations during the standup of the SLED SOC, mentoring junior and senior engineers to ensure their familiarity with system and process management using the various security tools at our disposal.
- Spearheaded the daily operations management of HA Fortigate chassis clusters, responsible for providing internet service and NGFW UTM tools to the entire Commonwealth of Pennsylvania.
- Developed a test lab environment with ProxMox virtualization, replicating production Fortigate setups for testing such as firmware upgrades, use-case evaluations, object management, syntax validation, and debugging.
- Handled the configuration and management of network security devices, including firewalls, intrusion detection/prevention systems, and virtual private networks (VPNs).
- Addressed layer 2 and layer 3 connectivity issues; BGP configurations; managed UTM features including web filter and IPS configurations such as custom categorizations and signatures.
- Created comprehensive technical documentation, produced standardized templates for common tasks, and initiated process improvement projects to optimize firewall configurations.
- Monitored and fine-tuned Zabbix and Splunk alerts, enhancing threat detection while significantly reducing false positives.