Securely architecting the network defense strategy for a large-scale manufacturing refinery led to a 40 percent reduction in unauthorized PLC access attempts over twelve months. During my tenure at Schneider Electric, I spearheaded the deployment of segmentation protocols that isolated critical assets from general office traffic, effectively neutralizing lateral movement risks before they could compromise uptime. This initiative stabilized operations across three distinct production lines, ensuring continuous output while hardening the industrial control environment against evolving digital threats. My focus remains on bridge building between legacy automation systems and modern threat detection standards.
At Honeywell, I utilized Wireshark and Nmap to audit communication latency, identifying and patching four major vulnerabilities within DNP3 and Modbus traffic patterns that previously exposed sensitive telemetry. I integrated Splunk to aggregate logs from disparate EtherNet/IP devices, which decreased incident response times by 60 percent for remote technicians. Furthermore, my implementation of OPC UA security wrappers across sixty workstations fortified authentication procedures for BACnet controllers. These efforts directly addressed persistent visibility gaps, transforming reactive maintenance into a proactive defense posture that protects high value infrastructure from external interference.
Dragos remains the industry leader for mapping sophisticated industrial adversaries, a reputation that draws me toward the senior analyst role within your threat intelligence division. My background in maintaining uptime in complex refinery environments aligns with your commitment to industrial safety. I admire your relentless focus on granular visibility into proprietary protocols, a challenge I tackled daily while managing heterogeneous environments at Schneider Electric. Applying my deep technical familiarity with industrial communication stacks to your specialized detection platforms will allow me to contribute immediately to the security of your global client base.
Securing industrial environments requires more than standard IT knowledge, necessitating a specialized approach that respects the criticality of real time processes. My operational experience at Honeywell and Schneider Electric prepares me to navigate the high stakes environment of your security operations center with precision. I possess the technical rigor to evaluate complex network behaviors and translate them into actionable intelligence. I look forward to discussing how my experience with industrial protocols can support the mission at Dragos. Please let me know when you are available to review these qualifications further.
Best regards,
David O'Brien
