Sr Principal Network & Security

About Northern Trust As a global leader in innovative wealth management, asset servicing, asset management and banking services, Northern Trust (Nasdaq: NTRS) is proud to guide the world’s most successful individuals, families, corporations and institutions. Since 1889, we have aligned our efforts with our three guiding Principles That Endure: Service, Expertise, and Integrity. Together, they reflect the three cornerstones of business conduct which we strive to instill in our employees, whom we call partners, and to provide to our clients and the communities we serve worldwide. With more than 135 years of financial experience and over 24,000 partners, we serve the world’s most sophisticated clients using leading technology and exceptional service.

Summary The Senior Principal Network Security Engineer is the highest-level individual contributor responsible for leading the design, engineering, and delivery of complex, multi-team network security initiatives. This role owns end-to-end technical execution for enterprise perimeter, internal segmentation, and application delivery controls, with deep hands-on expertise in Check Point firewalls and F5 load balancers. The engineer serves as a technical authority, driving architecture decisions, mentoring engineers, and ensuring operational resiliency through automation, rigorous troubleshooting, and incident mitigation. Primary Technology Focus Designing, Securing and building scalable, resilient enterprise-wide network Define and monitor - network security standards / Controls across on prem, hybrid and Private cloud networks through new generation firewalls / IDS/IPS, Micro segmentation and VPN’s Monitor and mitigate the network and security incidents across global events on prem, hybrid and private networks Ensure Audit and regulatory compliance requirements are implemented across network segmentations, firewalls, VPN’s and at perimeter security devices Check Point Firewalls (policy design, NAT, VPN, threat prevention, logging/telemetry, upgrades and migrations) F5 Load Balancers (LTM/ASM/APM as applicable; iRules; TLS profiles; health monitoring; high availability) Network routing and switching (BGP/OSPF, VLANs, VRFs, QoS, high-availability designs) Wireless networking (enterprise Wi‑Fi architectures, security controls, segmentation, troubleshooting) Secure web proxy platforms (forward proxy, TLS inspection, policy enforcement, troubleshooting) Enterprise network security initiatives (segmentation, zero trust patterns, control hardening, resiliency improvements) Key Responsibilities Lead the engineering delivery of complex network security and application delivery projects involving multiple teams, vendors, and stakeholders. Architect, implement, and operate Check Point firewall solutions including policy lifecycle management, NAT strategy, VPN solutions, and threat prevention capabilities. Design and engineer F5 load balancing solutions with strong understanding of traffic management, TLS, application health, and high availability. Develop and maintain automation for network security operations (e.g., configuration management, policy deployment, compliance validation, telemetry and reporting). Act as the senior escalation point for critical incidents—debug, mitigate, and resolve high-severity outages and security events across network/security domains. Establish engineering standards and reference architectures for firewalling, load balancing, routing/switching, wireless, and proxy capabilities. Drive continuous improvement: reduce toil, improve MTTR, implement reliability patterns, and proactively address technical debt. Partner with security engineering, infrastructure, application, and cloud teams to deliver secure-by-design solutions and ensure change safety. Conduct deep root-cause analysis (RCA) and produce actionable post-incident improvements, runbooks, and automation enhancements. Mentor senior engineers and provide technical leadership through design