Profile

Network & Security Engineer with 3+ years of hands-on experience in designing, configuring, and managing enterprise network infrastructures across LAN, WAN, WLAN, and security environments. Skilled in Cisco routing, switching, wireless, Cisco Meraki, and Aruba Central cloud-managed networks, along with multi-vendor firewalls. Strong experience preparing HLD/LLD documentation, architecture diagrams, and implementation plans. Proficient in routing protocols (BGP, OSPF, EIGRP), STP, VLANs, VPNs, and high-availability technologies. Adept at network performance tuning, incident response, and capacity planning. Holder of CCNA, with expertise in Cisco switches, routers, WLCs, Meraki MX/MS/MR, and Aruba APs.

Education

Bachelor of Computer Science (Hons) Network Technology and Cybersecurity

Lincoln University
Courses

Cisco Certified Network Associate (CCNA)

Cisco Certified Network Professional (CCNP - Enterprise)

Fortinet NSE 4 (Trained)

Palo Alto PCNSE (Trained)

RCPE Professional (NetIM, NetProfiler and Appresponse)

RCPE Associate (NetIM, NetProfiler and Appresponse)

Diploma in English

Professional Experience
09/2025 – PresentRiyadh, Saudi Arabia

Network & security engineer

Global Business Solutions
02/2023 – 01/2024Colombo, Sri Lanka

IT & Network Admin

LankaCom (PVT) Ltd
  • • Designed, configured, and maintained network systems, including routers, switches, and firewalls, ensuring high availability and security.
  • • Administered and optimized OSPF, EIGRP, and RIP routing, implementing route redistribution and troubleshooting adjacency issues.
  • • Managed VLAN segmentation and inter-VLAN routing, ensuring proper isolation and communication between departments.
  • • Monitored network traffic and performance metrics using SolarWinds and Wireshark, analyzing packet flows and troubleshooting latency issues to improve efficiency.
  • • Provided Layer 2 and Layer 3 network troubleshooting, resolving STP loops, duplex mismatches, IP addressing conflicts, and optimizing network convergence with rapid spanning tree (RSTP) and link aggregation (LACP).
  • • Led network expansion projects, adding new switches, implementing HSRP and VRRP for gateway redundancy, and ensuring seamless failover scenarios.
  • • Documented network topologies, change management processes, and troubleshooting steps for future reference.
  • •Provided technical support to internal users, aiding in troubleshooting connectivity issues and collaborating with senior engineers on network upgrades and optimization projects
    • Projects & Labs

    DMVPN Lab - HQ and Branch Office Design

  • •Designed and configured a dynamic multipoint VPN (DMVPN) lab with HQ and 3 branch offices over a simulated ISP. Implemented EIGRP with NHRP, verified adjacency, and resolved split-horizon issues.

    • Enterprise Network Design & Implementation

  • •Configured and optimized an enterprise-grade network with multiple VLANs, spanning tree, and Layer 3 inter-VLAN routing using Cisco CML.
  • •Implemented high-availability protocols (HSRP, VRRP) for redundancy and failover.

    • Palo Alto Firewall Deployment & Security Policies

  • •Simulated firewall deployment with security policies, NAT, and VPNs in EVE-NG.
  • •Configured application-based security rules and performed traffic inspection.

    • FortiGate Firewall Deployment (Freelance)

  • •Configured FortiGate firewall for a small business including basic policies, NAT, user authentication, and remote access VPN. Set up logging, monitoring, and created documentation for future maintenance.

    • Network Redundancy & High Availability Testing

  • •Configured HSRP, VRRP, and GLBP in Cisco Modeling Labs (CML) to ensure failover redundancy.
  • •Simulated link failures and tested automatic failover behavior.

    • OSPF Multi-Area Design with Route Summarization

  • •Designed and implemented a multi-area OSPF topology with backbone (Area 0) and two additional areas.
  • •Configured inter-area communication, ABRs, and summarization to reduce routing table size.
  • •Skills Highlighted: OSPF areas, route summarization, ABR/ASBR, LSA types, OSPF cost manipulation

    • EIGRP with Unequal Load Balancing and Authentication

  • •Deployed an EIGRP lab with unequal cost load balancing using variance and maximum-paths. Configured MD5 authentication between routers to secure adjacency. Verified routes and failover behavior.
  • •Skills Highlighted: Feasibility condition, EIGRP metric tuning, K-values, authentication, load balancing
    • Skills
    Network Infrastructure
    • •Cisco Routers, Switches, WLC
    • •Cisco Meraki (MX/MS/MR)
    • •Aruba Central (APs & WLAN management)
    • •VLAN, VTP, STP, EtherChannel, LAN/WAN
    Wireless
    • •Cisco WLC, Cisco Meraki MR
    • •Aruba Central-managed Wi-Fi
    Network Monitoring

    Wireshark, SolarWinds, Riverbed NetIM, NetProfiler, AppResponse

    Other skills

    Analytical thinking, Continuous learning, and Prompt engineering

    Routing & Switching
    • •BGP, OSPF, EIGRP, RIP
    • •HSRP, VRRP, RSTP, SNMP, NTP
    Security & Firewalls
    • •Meraki Security Appliances
    • •Palo Alto,
    • •Fortinet
    Communication and Collaboration

    Excellent verbal and written communication, adept at documentation and teamwork

    Documentation & Reporting

    Network diagrams, configuration documentation, incident reports

    Languages
    English
    Tamil
    Malayalam