Senior Network Security Engineer; L3 – Enterprise Infrastructure
Listed on 2026-03-13
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Engineering
Cybersecurity, Systems Engineer -
IT/Tech
Cybersecurity, Systems Engineer
Location: New York
Senior Network Security Engineer (L3) – Enterprise Infrastructure | New York City, NY | Hybrid (Scheduled WFH) | $120,000 – $140,000 Base
Northwest Talent Solutions (NWTS) is partnering with a global technology and digital transformation leader to recruit a Senior Network Security Engineer (L3) who will play a critical role in protecting and optimizing enterprise network infrastructure supporting large-scale business operations.
This is a hands-on engineering role responsible for designing, implementing, and maintaining advanced network security solutions across complex enterprise environments. The ideal candidate thrives in fast-paced environments, enjoys solving complex infrastructure challenges, and brings deep expertise in network security architecture and troubleshooting.
What You’ll Do:- Design, implement, and maintain enterprise network security infrastructure
- Architect and support Checkpoint and Fortinet firewall environments
- Provide L2/L3 support for network security incidents and outages
- Implement secure connectivity solutions for internet and extranet environments
- Support F5 LTM/GTM load balancers and WAF configurations
- Configure and manage Pulse Secure SSL VPN and Citrix Net Scaler ADC
- Conduct vulnerability assessments and remediation across network devices
- Monitor and maintain McAfee Web Gateway proxy environments
- Create network topology diagrams and documentation for operational support
- Resolve operational incidents (P1–P3) within defined SLAs
- 10+ years of enterprise network engineering or network security experience
- Deep expertise with Checkpoint and Fortinet firewall platforms
- Experience supporting Cisco networking environments (ASR, Nexus, Catalyst)
- Strong knowledge of routing protocols (BGP, OSPF, EIGRP)
- Experience supporting F5 load balancers and WAF
- Hands‑on troubleshooting across Layer 2/Layer 3 networks
- Strong understanding of TCP/IP, packet analysis, and Wireshark/tcpdump
- Experience with Infoblox IPAM and DNS management
- Knowledge of NIST frameworks and security best practices
- Experience in financial services or regulated environments preferred
- Work on mission‑critical enterprise security infrastructure
- Influence architecture across a large‑scale global network environment
- Join a team focused on cyber resilience, performance, and innovation
- Hybrid flexibility in New York City
Northwest Talent Solutions (NWTS) partners with global organizations to deliver exceptional talent across cybersecurity, infrastructure, cloud, and AI‑driven technology environments. Our mission is to connect world‑class professionals with opportunities where they can make meaningful impact.
Interested candidates should apply directly or contact NWTS for a confidential conversation.
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