Darshana Jayarathna
Darshana Jayarathna
Sr. Network & Security Engineer
🌍 Open to Global Remote Opportunities | System & Network | IPS Engineering | Cloud | Cybersecurity

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

Senior Network & Security Engineer with deep expertise across Fortinet perimeter firewalls, Cisco CCNP enterprise routing, Huawei Datacenter ECC800 pods, SD-WAN interconnects, and multi-cloud resilience.

Darshana Jayarathna
8+
Years Experience
60+
Verified Certifications
1st Class
BEng Honors & Gold Medal
4 Major
Enterprise Rollouts
Professional Background

Engineering Reliable, Resilient & Secure Digital Infrastructures

Currently serving as IT Support Coordinator at Marriott Executive Apartments Doha, Le Mirage City Walk in Qatar. I bring hands-on mastery in converting high-profile properties into international Marriott brand standards, running critical hospitality systems (Oracle Opera PMS, VICAS, Micros, VingCard/Saflok), and maintaining high-availability datacenter infrastructure (Huawei ECC800, Fortinet 900D clusters).

Previously delivered nationwide SD-WAN and enterprise firewall transformations across financial and insurance corporations in Sri Lanka, backed by a First Class Honors BEng in Computer Networking and recognition as a Gold Medalist from London Metropolitan University.

Cisco NetAcad Instructor

TRIDI NET ACADEMY CA 400052058 (11/2023 – 12/2024)

Active instructor mentoring network engineers in Cisco CCNP routing, switching architectures, and CyberOps.

MBCS British Computer Society

Member ID: 995123787 (02/2023 – 02/2024)

Professional member adhering to strict codes of engineering conduct, zero trust ethics, and continuous professional development.

Languages & Communication

EnglishProfessional Working
SinhalaNative / Bilingual
Tamil & HindiElementary

Interests & Pursuits

Technical web article writing, chaos engineering drills, continuous cloud labs, and international travel.

Chronological History

Professional Work Experience

Chronological history across luxury hospitality, corporate finance, insurance, and academic laboratories.

07/2022 — Present • 4 yrs 3 mos
Marriott International • Doha, Qatar

Information Technology Coordinator & Network Engineer

Marriott Executive Apartments Doha, Le Mirage City Walk | Marriott Bonvoy

  • Technical Support: Provide technical support to users for hardware and software issues, including computer systems, mobile devices, and other IT equipment. Monitor network performance and troubleshoot network problems.
  • IT Infrastructure Management: Manage company IT infrastructure including Aruba controllers, Fortinet 900D firewalls, Cisco/Aruba switches, Huawei Datacenter ECC800, Hotel Opera System, VICAS, IPTV, IP Phone (Alcatel), Micros, SUN Backoffice, VingCard & Saflok keys, and Mobile Key Card System.
  • Guest IT Support: Respond to guest IT support requests and ensure the smooth functioning of guest technology.
  • Server Management: Manage Opera servers and Windows servers to ensure optimal performance.
  • IT Policies and Procedures: Assist with the development and implementation of IT policies and procedures, ensuring security and compliance with relevant regulations.
11/2023 — 12/2024 • 1 yr 2 mos
Cisco Networking Academy • Remote

Cisco Certified Academy Instructor

Tridi Net Academy (CA 400052058)

Teaching official Cisco courses as a Cisco Network Academy instructor. Mentoring students in CCNP Enterprise Advanced Routing, OSPF/BGP protocols, and CyberOps security incident handling.

01/2022 — 06/2022 • 6 mos
Central Finance Company PLC • Colombo, Sri Lanka

Network Engineer

  • Operating master consoles to monitor the performance of networks and computer systems.
  • Design, implement, and maintain the company's network infrastructure, including LAN, WAN, and wireless networks.
  • Updating network equipment to latest firmware releases and reporting network status to stakeholders.
  • Installing, configuring, and supporting network equipment including routers, proxy servers, switches, WAN accelerators, DNS and DHCP.
  • Manage and configure network disaster recovery planning and testing to ensure rapid restoration.
  • Support and administer firewall environments in line with IT security policy.
10/2020 — 12/2021 • 1 yr 3 mos
Continental Insurance Lanka Limited • Colombo, Sri Lanka

System Engineer

  • Manage and monitor all installed systems and infrastructure (VMware ESXi, Hyper-V).
  • Install, configure, test and maintain operating systems, application software and system management tools.
  • Proactively ensure highest levels of systems and infrastructure availability.
  • Maintain security, backup, and redundancy strategies (Veeam & Nakivo).
  • Write and maintain custom scripts (Python, PowerShell) to increase system efficiency and reduce human intervention time.
03/2019 — 10/2020 • 1 yr 8 mos
Azitas Code • Kandy, Sri Lanka

Network Administrator

  • Establishes and maintains network performance.
  • Establishes networking environment by designing system configuration and directing system installation.
  • Secures network system by establishing and enforcing policies and defining monitoring access.
  • Updates data servers and network equipment; configures and audits network devices.
10/2016 — 09/2018 • 2 yrs
ESOFT Metro Campus • Kandy, Sri Lanka

Network Administrator & Lab Instructor

  • Manage ESOFT Kandy Branch Network infrastructure.
  • Support students for undergraduate networking subjects and packet tracer laboratories.
  • Assistance with the demonstration of experiments and software to undergraduate students.
03/2015 — 12/2015 • 10 mos
Etisalat Lanka (Private) Limited • Colombo, Sri Lanka

Associate — Subscriber Registration Operations

  • Coordinate system development tasks to include design, integration and formal testing.
  • Oversees all transitions into production and system specifications.
  • Create and maintain programmatic and technical documentation to ensure efficient planning and execution.
10/2014 — 02/2015 • 5 mos
Data Tech Business Center • Colombo, Sri Lanka

Computer Hardware Technician & Trainee Network Engineer

  • Component-level motherboard diagnosis, assembly, and preventive maintenance.
  • Install, configure, test and maintain operating systems and system management tools.
  • Perform cabling, connecting and configuring of peer-to-peer enterprise networks.
Enterprise Deployments

Featured Technical Projects

High-impact infrastructure rollouts delivered across hospitality, finance, and datacenters.

Marriott International • 09/2022 — Present

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
Datacenter Engineering • 07/2022 — 01/2023

Huawei ECC800 Datacenter Migration

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 SAN / NAS Zero Downtime
Banking Network • 01/2022 — 05/2022

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.

Fortinet SD-WAN BGP Routing SLT Fiber IPsec Mesh
Telephony & VoIP • 04/2023

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.

Alcatel PBX SIP Trunking VoIP QoS VLAN Voice
Competencies

Technical Skills & Technologies

Comprehensive overview of technologies mastered in live enterprise environments.

Firewalls & Security

  • Fortinet FortiGate (900D)
  • Palo Alto Networks
  • WatchGuard Firewalls
  • Zero Trust Architecture

Enterprise Networking

  • Cisco R&S (CCNP / CCNA)
  • Huawei R&S & ECC800 Pods
  • Aruba R&S & Wireless AirWave
  • BGP, OSPF, VLANs, SD-WAN

Cloud & Virtualization

  • Oracle Cloud Infrastructure (OCI)
  • Microsoft Azure & AWS
  • VMware ESXi & Hyper-V
  • Veeam & Nakivo Replicators

Systems & Hospitality

  • Oracle Opera PMS
  • Micros POS & Sun Backoffice
  • VingCard / Saflok / Mobile Key
  • Alcatel PBX & SIP Trunking
Verified Credentials 60+ Total

Licenses, Certifications & Badges

Scroll inside container to explore all 60+ verified credentials.

Showing 60 of 60 credentials Scroll inside box
Academic Foundation

Education & Gold Medal Honors

International degree credentials and consecutive best-performance awards.

GOLD MEDALIST
2019 — 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 2021 Awarding Ceremony.

• Wireless Network (Cisco) • Network Planning & Simulation
• Network Security (Cisco) • Cloud & Network Security
Capstone Project: "High Secure LAN and Cloud Network Design for Hospital Industry"
First Class Honours (1st) • Gold Medal Award
2017 — 2019 • Pearson UK SILVER MEDAL

Higher National Diploma in Computer Networking (Level 5 RQF)

Pearson Education (Edexcel) UK • ESOFT Metro Campus

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

• Transport Network Design • Cloud Computing & Business Intelligence
Research Project: "Use of AI Framework to understand behavioral patterns of terrorists on social media"
Graduated with Distinction • Silver Medal Award
Let's Connect

Available for Strategic Network & Infrastructure Roles

Whether you need guidance on a complex multi-site SD-WAN migration, hardening perimeter firewalls against advanced threats, or leading hotel technology transitions, feel free to reach out.

EMAIL ADDRESS ruwandrcj@gmail.com
DIRECT PHONE & WHATSAPP (+974) 660 44107 (Qatar) / (+94) 77 134 2802
LINKEDIN DIRECT linkedin.com/in/darshanacj

Send Direct Message

Knowledge Hub

20 Expert Technical Articles & Field Guides

Comprehensive 500+ word deep dives authored by Darshana Jayarathna based on real enterprise deployments in Doha, Colombo, and London.

Academic Repository

Academic Research & Publications