Abdul Hadi

Senior Network Engineer with 8+ years of experience in designing, implementing, configuring, troubleshooting, and testing complex networking systems. Proven expertise in Layer 3 routing, Layer 2 switching, firewalls, load balancing, and security architecture. Skilled in network planning, data center migrations, and implementing enterprise-grade network security solutions.

Strong knowledge of industry protocols, compliance standards, and best practices. Adept at leading large-scale projects, mentoring teams, and delivering secure, high-performance network infrastructures.

Senior Network Engineer - Tata Consultancy Services - NJ

(2023-07)

• Design, plan, and implement complex LAN, WAN, WLAN, SD-WAN, and cloud networking infrastructures.
• Develop scalable, secure, and highly available network architecture.
• Evaluate and recommend new networking technologies and solutions to improve performance.
• Configure routers, switches, firewalls, VPNs, and load balancers.
• Deploy VLANs and routing protocols (BGP, OSPF, EIGRP) for optimized traffic flow.
• Implement enterprise security best practices, including ACLs, IPS/IDS, and zero-trust models.
• Monitor and analyze network performance, ensuring uptime and capacity compliance.
• Troubleshoot advanced multi-layer connectivity and routing issues.
• Lead major network upgrade and migration projects from design through execution.
• Perform firmware updates, security patches, and preventive maintenance.
• Maintain and enforce network security policies and compliance with ISO 27001, PCI-DSS, and NIST.
• Develop disaster recovery and failover strategies, implementing redundancy for mission-critical systems.
• Collaborate with cloud, systems, and security teams to deliver integrated solutions.
• Configured VLANs, routing, and security policies using Meraki Dashboard to ensure secure and efficient network operations.
• Monitored network performance and client connectivity using Meraki analytics and reporting tools.
• Troubleshot network issues related to DHCP/DNS failures, IP conflicts, and connectivity disruptions.
• Implemented high availability and redundancy strategies for critical network services.
• Collaborated with cross-functional teams to design and deploy scalable network solutions.
• Mentor junior engineers and serve as the primary escalation point for critical issues.
• Manage vendor and ISP relationships, including procurement and licensing.
• Analyze performance metrics and implement network optimizations.

Senior Network Security Engineer - Illinois Department of Innovation & Technology - IL

(2020-09 - 2023-06)

• Enhanced infrastructure by adding switches to server farms and expanding DMZ environments.
• Configured routing protocols (CIDR, RIP, PPP, BGP, OSPF) for optimized performance.
• Set up Aruba Wireless Access Points and Controllers for enterprise wireless access.
• Configured High Availability with Check Point ClusterXL and VRRP for stateful failover.
• Deployed Cisco ASA Firepower Services with Sourcefire IPS and AMP.
• Managed F5 LTM and A10 Thunder load balancers for load distribution and traffic optimization.
• Supported Palo Alto firewall deployments via Panorama for centralized management.
• Designed and deployed Palo Alto-based network security solutions, including URL filtering and threat prevention.
• Executed migrations from Check Point and Cisco ASA to Palo Alto firewalls.
• Managed Infoblox DDI and F5 GTM configurations for DNS, SSL termination, and redundancy.
• Led multiple network upgrade and migration projects for enterprise systems.

Network Security Engineer - Frontier Communications Inc - Norwalk, CT

(2018-11 - 2020-08)

• Designed, installed, and troubleshot Palo Alto and Check Point firewalls.
• Configured NAT, VPNs (IPsec, SSL), and remote access solutions on ASA and Check Point platforms.
• Implemented Aruba ClearPass for NAC and device visibility.
• Created policies and alerts using SIEM tools (Splunk, SolarWinds, LogRhythm).
• Migrated firewall infrastructure from Cisco ASA to Palo Alto and Check Point.
• Implemented zone-based firewall rules, advanced security profiles, and VPN encryption upgrades.
• Redesigned WAN routing from OSPF to BGP, converting WAN links from TDM to MPLS.

Jr. Network Engineer - Orange Business Services Mauritius Ltd - Oak Hill, VA

(2015-02 - 2018-09)

• Supported LAN/WAN operations, ensuring compliance with policies and SLAs.
• Administered Cisco network equipment for enterprise switching, routing, and security.
• Managed network documentation using Microsoft Visio and Cisco Works.
• Assisted in large-scale LAN/WAN deployments, testing, and troubleshooting.
• Provided technical support for backbone components including routers and switches.