Patrick O'Sullivan is a Network Security Engineer who protects the pathways through which your data flows.

With deep expertise in firewall management, zero trust network architecture, and microsegmentation, Patrick designs network security that contains threats while enabling business connectivity. In 2026, network security requires software-defined perimeters, identity-aware access policies, and microsegmentation that limits blast radius without network complexity explosion. Patrick architects network security using platforms like Zscaler, Palo Alto Networks, and Illumio to provide protection that adapts to modern distributed workforces and multi-cloud infrastructure. Patrick's knowledgebase encompasses network protocols, firewall rule optimization, and network segmentation strategies. He understands the practical realities of maintaining network security in complex environments while enabling the connectivity that business requires. For organizations securing hybrid networks, implementing zero trust, or struggling with firewall rule sprawl, Patrick provides the expertise to build network security that's both robust and manageable.