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Senior Network Security Engineer

Senior Network Security Engineer

MindlanceOrange, CT
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Job Summary

We are seeking a highly skilled Senior Network Security Engineer to join our team and play a key role in securing, optimizing, and transforming our enterprise network infrastructure. The ideal candidate will have deep expertise in firewall security, NAT, IPSEC, SD-WAN, routing protocols (EIGRP, BGP, OSPF), and cloud security solutions. This position will focus on managing and enhancing our security infrastructure, which includes :

  • Cisco ASA, Checkpoint, Fortinet FortiGate, Palo Alto Firewalls.
  • Radware for DDoS protection.
  • Zscaler ZIA / ZPA for cloud security.
  • SD-WAN for optimized global connectivity.
  • EIGRP, BGP, and OSPF-based network routing.
  • NAT policy design and implementation

A key initiative for this role is leading the migration from Checkpoint to Fortinet firewalls while ensuring seamless network security operations. Additionally, the engineer will support and enhance our SD-WAN deployment for optimized global connectivity and application performance.

Key Responsibilities

  • Lead the migration from Checkpoint to Fortinet, including policy conversion, rule optimization, and traffic validation.
  • Manage and maintain Cisco ASA, Palo Alto, Fortinet, and Checkpoint firewalls across corporate, cloud, and remote sites.
  • Design and optimize firewall rule sets for improved security, performance, and compliance.
  • Perform risk assessments and firewall audits to ensure network security best practices.
  • Manage and optimize SD-WAN architecture to improve application performance and reduce latency.
  • Implement policy-based traffic steering, failover mechanisms, and WAN optimization.
  • Troubleshoot SD-WAN performance issues, routing conflicts, and connectivity problems.
  • Work with network and security engineers to ensure secure connectivity between on-premises, branch locations, and cloud.
  • Design and implement NAT policies, including static NAT, dynamic NAT, and PAT (Port Address Translation).
  • Configure and troubleshoot EIGRP, BGP, and OSPF for enterprise and cloud routing.
  • Optimize routing policies to ensure high availability, redundancy, and performance.
  • Administer and optimize Zscaler ZIA / ZPA solutions for secure cloud access and web filtering.
  • Implement zero-trust security policies for cloud applications and remote users.
  • Troubleshoot Zscaler tunnels, proxy configurations, and application access issues.
  • Implement and maintain Radware DDoS protection to safeguard network infrastructure from volumetric and application-layer attacks.
  • Configure IPS / IDS solutions to detect and mitigate security threats.
  • Work with SOC teams to analyze and respond to security incidents.
  • Lead firewall, SD-WAN, NAT, and routing issue troubleshooting affecting business-critical applications.
  • Perform packet capture analysis and use security logs to diagnose network issues.
  • Work with vendors (Cisco, Fortinet, Palo Alto, Zscaler) to resolve complex technical issues.
  • Develop and enforce firewall and network security policies in compliance with NIST, CIS benchmarks, and ISO standards.
  • Develop scripts (Python, Bash, PowerShell) for automating firewall audits and SD-WAN policy updates.
  • Optimize firewall and SD-WAN policies to reduce latency and improve efficiency.
  • Implement network automation frameworks to streamline security operations

    • Skills :

    Required Skills & Experience

  • years of experience in network security engineering.
  • Expertise in Fortinet FortiGate, Checkpoint, Palo Alto, and Cisco ASA firewalls.
  • Strong knowledge of SD-WAN solutions (Fortinet SD-WAN, Cisco SD-WAN, Prisma Access).
  • Experience configuring and troubleshooting EIGRP, BGP, and OSPF routing protocols.
  • Hands-on experience managing Zscaler ZIA / ZPA for cloud security.
  • Proficiency in VPN technologies (IPSec, SSL, GRE, DMVPN, LTP) and their security implications.
  • Strong skills in NAT, firewall rule optimization, and routing table analysis.
  • Experience with Radware DDoS protection, IPS / IDS, and threat mitigation.
  • Knowledge of zero-trust security architectures and secure SD-WAN implementation.
  • Strong analytical skills for troubleshooting network security issues, including packet captures and firewall logs.

    • Education :

    Preferred Qualifications

  • Certifications : Fortinet NSE / , Checkpoint CCSA / CCSE, Palo Alto PCNSA / PCNSE, Cisco CCNP Security, Zscaler ZCCP, SD-WAN certifications.
  • Experience with AWS, Azure, and GCP cloud security best practices.
  • Familiarity with SIEM solutions for security event monitoring.
  • Experience automating security tasks using Python, Ansible, or Terraform.

    • EEO :

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