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Darshana Jayarathna

Sr. Network & Security Engineer • Doha, Qatar

Open to Worldwide Remote & Qatar / Middle East Enterprise Roles

Architecting High-Availability Enterprise Networks & Zero-Trust Defense.

Senior Network & Security Engineer with 8+ years of production experience orchestrating Fortinet perimeter security, Cisco CCNP enterprise routing, Huawei Datacenter modular pods, nationwide SD-WAN failovers, and Marriott International hospitality conversions.

BCS Member #995123787 Cisco NetAcad Instructor #CA400052058 1st Class Gold Medalist
Darshana Jayarathna

Darshana Jayarathna

Le Mirage City Walk • Doha, Qatar

ruwandrcj@gmail.com (+974) 660 44107
8+ Years
Enterprise Experience
18+ Total
Verified Certifications
1st Class
BEng Gold Medalist
4 Major
Enterprise Rollouts
Career Milestones

Professional Work Experience

8+ years spanning international luxury hospitality, financial institutions, insurance, and academic laboratories.

07/2022 — Present • Current Role

IT Support Coordinator & Network Engineer

Marriott Executive Apartments Doha, Le Mirage City Walk

Doha, Qatar

Directing technical upgrades and infrastructure conversions to Marriott International brand standards. Managing core technology infrastructure: Aruba controllers and access points, Fortinet 900D firewalls, Cisco switches, Huawei Datacenter ECC800 pods, Oracle Opera PMS servers, VICAS IPTV, Alcatel IP PBX, Micros POS, and VingCard/Saflok BLE Mobile Key entry systems.

Fortinet 900D Oracle Opera PMS Huawei ECC800 Aruba Wireless VingCard BLE Alcatel PBX
01/2022 — 06/2022

Network Engineer

Central Finance Company PLC

Colombo, Sri Lanka

Engineered enterprise SD-WAN connectivity linking branch offices with Colombo headquarters via Fortinet security appliances and Sri Lanka Telecom redundant fiber circuits. Administered BGP/OSPF dynamic routing, automated sub-second failovers, enterprise perimeter policies, and disaster recovery replication drills.

Fortinet SD-WAN BGP Routing SLT Fiber Redundancy Disaster Recovery
10/2020 — 12/2021

System Engineer

Continental Insurance Lanka Limited

Colombo, Sri Lanka

Administered multi-site VMware ESXi and Hyper-V virtualization clusters, Nakivo and Veeam automated backups, and Palo Alto / WatchGuard perimeter firewalls protecting corporate financial records and insurance underwriting infrastructure.

VMware ESXi Veeam & Nakivo Palo Alto Hyper-V
2016 — 2020

Network Administrator & Lab Instructor

Azitas Code (Introps) & ESOFT Metro Campus

Kandy, Sri Lanka

Administered development networks, secured dev subnets, and deployed CI/CD conduits at Azitas Code. Guided undergraduate engineering students in live Cisco rack configurations, subnetting mathematics, and Packet Tracer network demonstrations.

Cisco Packet Tracer Hardware Labs Linux & Windows Server
Production Architecture

Featured Enterprise Projects

High-stakes infrastructure deployments delivered with zero downtime and strict compliance.

09/2022 — Present Marriott International

Marriott Property Conversion at Le Mirage City Walk

Complete infrastructure uplift converting property network, security perimeter, and guest technology to Marriott Global Standards. Enforced zero-trust network segmentation between guest VLANs, administrative financial systems, and IoT locks.

Fortinet 900D Aruba Wireless Opera PMS VingCard BLE
07/2022 — 01/2023 Datacenter Migration

Huawei ECC800 Datacenter Pods Consolidation

Spearheaded end-to-end datacenter consolidation and migration into modular Huawei ECC800 pods. Maintained zero downtime across active guest reservations and billing systems with high-density optical patch reorganizations.

Huawei ECC800 Cisco Core Zero Downtime
01/2022 — 05/2022 Banking SD-WAN

Central Finance SD-WAN Nationwide Rollout

Implemented Fortinet Secure SD-WAN across distributed branch offices linking to Colombo headquarters. Integrated primary and secondary Sri Lanka Telecom fiber connections with automated sub-second failover and dynamic BGP route policy steering.

Fortinet SD-WAN BGP Routing SLT Fiber Redundancy
04/2023 Telephony & VoIP

Alcatel PBX and VoIP Infrastructure Deployment

Complete setup and configuration of Alcatel PBX servers, SIP trunking, and IP phones across guest apartments and back-office administrative departments for crystal clear high-density communication and automated QoS priority.

Alcatel PBX SIP Trunking VoIP QoS
Core Competencies

Technical Infrastructure Stack

Enterprise vendor hardware, next-generation security, cloud fabrics, and hospitality IT.

Perimeter & Firewalls

  • Fortinet FortiGate (900D)
  • Palo Alto Networks
  • WatchGuard & Sophos
  • SonicWall Firewalls
  • DPI SSL & Threat Feeds

Routing & Switching

  • Cisco CCNP / CCNA
  • Huawei R&S & ECC800
  • Aruba Switches & AirWave
  • BGP, OSPF, VLANs, LACP
  • SD-WAN Sub-Second Failover

Cloud & Virtualization

  • Microsoft Azure (AZ-104)
  • Oracle Cloud (OCI AI)
  • Amazon Web Services (AWS)
  • VMware ESXi & Hyper-V
  • Aviatrix Multi-Cloud Transit

Hospitality IT Systems

  • Oracle Opera PMS Core
  • Micros POS & Sun Backoffice
  • VingCard / Saflok BLE
  • Veeam Backup Replication
  • CrowdStrike Falcon EDR
Verified Credentials

Licenses, Certifications & Badges (18+)

Interactive credentials directory with verified license IDs and certifying bodies.

Cisco NetAcad 2024

Cisco Certified Network Professional (CCNP): Advanced Routing

Enterprise IP routing, BGP multi-homing architectures, and policy routing.

Status: Verified
Cisco NetAcad 2024

CCNP Enterprise: Core Networking

Dual-stack architecture, network virtualization, and infrastructure security.

Status: Verified
Cisco NetAcad 2023

Cisco Certified CyberOps Associate

SOC incident detection, forensics, and rapid threat containment.

Status: Verified
Cisco NetAcad ID: CSCO12920099

Cisco CCNA Routing and Switching

Core LAN/WAN routing protocols, spanning tree, and IPv4/IPv6 architectures.

ID: CSCO12920099
Cisco NetAcad 2023

Cisco CCNA Security

Network perimeter hardening, AAA authentication, ACLs, and VPN encryption.

Status: Verified
Fortinet Institute ID: OQlkKjyxTf

Fortinet NSE 3 Network Security Associate

FortiGate, FortiManager, FortiAnalyzer, and cyber perimeter hardening.

ID: OQlkKjyxTf
BCS UK ID: 63e2b3a00a18052e58fd3b35

The Ethical IT Professional

Chartered Institute for IT code of ethics, security governance, and compliance.

Chartered BCS
Oracle Academy 2023

OCI 2023 AI Certified Foundations Associate

Oracle Cloud AI services, machine learning models, and semantic processing.

Status: Verified
Aviatrix ID: 2021-12095

Aviatrix Multi-Cloud Network Associate

Transit networking connecting AWS, Azure, and OCI at wire speed.

ID: 2021-12095
ICSI UK ID: 17707740

Security Certified Network Specialist (SCNS)

International CyberSecurity Institute UK defensive operations.

ID: 17707740
Google / Coursera ID: XC32MRSQZDQ8

Google System Administration & IT Infrastructure

Enterprise directory services, recovery policies, and server deployment.

Google Verified
IBM ID: NMX94PVG4UL5

IBM Cybersecurity Roles & OS Security

Operating system hardening, privilege containment, and forensic log triage.

IBM Verified
Academic Excellence

Education & Prestigious Honors

International degree credentials, consecutive Best Performance awards, and Gold Medal honors.

GOLD MEDAL
2020 • London, UK

Bachelor of Engineering (Hons) in Computer Networking

London Metropolitan University UK

Graduated with First Class Honours. Awarded the prestigious Gold Medal for Best Performance at the Awarding Ceremony 2021.

First Class Honours (1st) • Gold Medalist
2019 • Pearson UK SILVER MEDAL

Higher National Diploma in Computer Networking

Pearson Education (Edexcel) UK

Graduated with Distinction. Conferred the Silver Medal for Best Performance at the Diploma Awarding Ceremony 2017.

Graduated with Distinction
2015 • VTA Sri Lanka

NVQ Level 4 (Computer Hardware Technician)

Vocational Training Authority Sri Lanka

Specialized in motherboard circuit diagnosis, system buses, peripheral architectures, and hardware failure isolation.

Completed & Certified
Direct Channel

Available for Strategic Network & Infrastructure Roles

Whether you need technical leadership for an enterprise SD-WAN rollout, perimeter firewall hardening, hospitality brand conversions, or infrastructure consultations, feel free to reach out.

EMAIL ADDRESS ruwandrcj@gmail.com
PHONE (QATAR & SRI LANKA) (+974) 660 44107 / (+94) 77 134 2802
VERIFIED LINKEDIN linkedin.com/in/darshanacj

Send Direct Message

Knowledge Hub

Articles & Technical Writing

Deep-dives on enterprise SD-WAN routing, next-generation firewall policies, and luxury hospitality IT authored by Darshana Jayarathna.

Peer-Reviewed Science

Academic Research & Publications

Machine learning behavioral threat models and academic papers authored by Darshana Jayarathna.

Featured Peer-Reviewed Publication • ResearchGate (2019)

"Use of AI Framework to Understand Behavioral Patterns of Terrorists on Social Media"

Investigates natural language processing (NLP), semantic sentiment classification, and recurrent graph heuristics to detect covert radicalization pathways and terrorist recruitment networks across public social media platforms. Conferred the First Class Honours Gold Medal from London Metropolitan University.

Author: Darshana Jayarathna London Metropolitan University Gold Medalist Research
View on ResearchGate