L3 Network Security Engineer

About the Role

We are seeking an experienced L3 Network Security Engineer to our Infrastructure and Cybersecurity team. The successful candidate will be responsible for the design, implementation, optimization, automation, and operational support of enterprise network and security infrastructure across mission-critical environments. This role requires deep technical expertise in network security technologies and a strong focus on infrastructure automation.

Key Responsibilities

• Provide Level 3 technical support for complex network and security incidents, ensuring high availability and performance of enterprise infrastructure.
• Design, implement, and maintain large-scale network security solutions across data center, campus, and cloud environments.
• Manage and support security platforms including: Cisco (Routing, Switching, ACI, SD-WAN) Palo Alto Networks Firewalls Check Point Firewalls Fortinet Security SolutionsF5 Load Balancers (LTM/GTM) Infoblox DDI (DNS, DHCP, IPAM)
• Lead troubleshooting and root cause analysis for critical network and security issues.
• Develop and implement automation solutions to improve operational efficiency and reduce manual processes.
• Create automation scripts and workflows using Python, Ansible, and API integrations.
• Collaborate with cybersecurity, cloud, infrastructure, and application teams on security architecture reviews and project implementations.
• Participate in infrastructure transformation initiatives, network modernization, and security enhancement projects.
• Maintain technical documentation, operational procedures, and network standards.

Required Qualifications

• Bachelor's Degree in Computer Science, Information Technology, Engineering, or related discipline.
• Minimum 5 years of experience in enterprise network and security engineering.
• CCIE Certification
• Strong hands-on experience supporting and administering:Cisco Networking TechnologiesPalo Alto FirewallsCheck Point FirewallsFortinet FirewallsF5 Load BalancersInfoblox DDI Solutions
• Expertise in routing and switching protocols including:BGPOSPFEIGRPMPLSVLANsVPN Technologies
• Proven experience in infrastructure automation using:PythonAnsibleREST APIsInfrastructure as Code (IaC)
• Strong understanding of network security principles, segmentation, firewall policies, and threat mitigation.
• Experience supporting highly available and mission-critical environments.
• Excellent troubleshooting, analytical, and problem-solving skills.

Preferred Qualifications

• PCNSE, CCNP Security, Check Point CCSA/CCSE, NSE4/NSE7, or F5 certifications
• Experience with cloud networking and security (AWS, Azure, GCP)
• Knowledge of SASE, Zero Trust Architecture, SD-WAN, and Network Access Control (NAC)
• Experience in financial services, banking, or regulated enterprise environments
• Exposure to DevOps and CI/CD practices