Information Security Engineer, Network Security Engineering

JLL•Houston, TX

3d•Remote

About The Position

This is a hands-on, highly technical role responsible for securing JLL’s global network infrastructure. The ideal candidate brings a security-first mindset, a bias towards action, and deep expertise in Palo Alto Networks technologies alongside broad command of API security, WAF/CDN platforms, and complex troubleshooting across network and application layers. You’ll work collaboratively with global engineering, application, and security teams to ensure security controls are intelligence-driven, optimized, and aligned to industry best practices.

Requirements

5+ years of hands-on network security engineering experience designing and implementing enterprise-scale security solutions
Expert-level proficiency in Palo Alto Networks — NGFWs, Panorama policy management, and PAN-OS; PCNSE or PCNSC certification strongly preferred
Expert troubleshooting skills across network and application layers, including packet capture analysis on complex, dynamically routed architectures
Deep understanding of layer 7 web application technologies and WAF/CDN platforms (e.g. Akamai, Cloudflare, Imperva, F5) — onboarding, policy tuning, break/fix troubleshooting, and operational management
Solid grounding in API security — ensuring API traffic routes through security tooling, evaluating identified vulnerabilities, and partnering with application teams to drive remediation
Strong HTTP/application security knowledge: TLS interception, SQL injection, XSS, CSRF, command injection, LFI/RFI, rate limiting, bot detection, geo-blocking, and sinkholing
Intermediate to advanced network routing and switching knowledge with focus on DNS, TCP/IP, IPsec, TLS, GRE, OSPF, and BGP
Proficiency in at least one scripting language (Python preferred) and familiarity with Linux/CLI tooling
Working knowledge of public cloud environments (Azure, AWS, GCP)
Experience with at least one SIEM platform for log analysis, behavioral analytics, and rule tuning
Proven written and verbal communication skills, including presenting to both technical and non-technical audiences
Proven track record of taking ownership in unstructured environments — cutting through ambiguity, making sound decisions with incomplete information, building stakeholder consensus, and delivering security improvements without waiting for top-down direction

Nice To Haves

Industry certifications: PCNSE, PCNSC, CCNP/CCIE Security, GIAC (GWAPT, GPEN, or similar)
Experience building metrics pipelines and KPI reporting for security operations
Familiarity with interconnecting disparate security technologies to solve unique application and security challenges

Responsibilities

Serve as the primary subject matter expert for Palo Alto Networks technologies (NGFWs, Cloud NGFW, Panorama), Web Application Firewall, Content Delivery Network, API Security, IDS/IPS, and DDoS prevention
Own onboarding, policy tuning, and lifecycle management for WAF and CDN platforms; lead firewall ruleset optimization, IDS/IPS tuning, and DDoS protection configuration
Partner with internal teams to drive the global rollout, tuning, and operational management of URL filtering and TLS decryption across the network estate
Lead API security efforts — ensuring API traffic routes through security tooling, identifying vulnerabilities, and working with application teams on fixes
Lead troubleshooting of complex, multi-layer global network and application issues — from packet captures on inter-continental BGP topologies to WAF false-positive triage
Partner with business and application teams to produce clear, actionable security documentation, change proposals, and executive-ready findings
Analyze existing network security architectures, processes, and procedures to identify gaps and drive meaningful improvements
Configure and report on defensive measures against advanced threat actor tactics; maintain current awareness of the evolving threat landscape and the effectiveness of our defenses against them
Communicate complex technical problems and solutions clearly to both global engineering teams and C-suite stakeholders
Champion the broader Security team’s initiatives, not just Network Security Engineering
Participate in the maintenance and tuning of all network security technologies including WAFs, CDNs, VPNs, and application-aware firewalls
Leverage and contribute to automation pipelines for global firewall rule deployment and policy management across the network estate
Utilize security tooling telemetry and data collection automations to produce actionable reporting and metrics for internal teams and executive stakeholders