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Hi, I'm
Buddhisha.

$ Network & Systems Engineer

Results-driven infrastructure specialist bridging traditional networking and automated DevNetOps workflows. Building secure, scalable environments with Python, Ansible, and multi-vendor toolchains across Cisco, HPE, SonicWall, Fortinet, and Aruba platforms.

ls /projects ./whoami ssh --connect

Network & Systems Eng. Delko Technologies

📍

Base of Operations Colombo District, Sri Lanka

/usr/bin/whoami

B.Tech Undergraduate in Network Technology at the University of Vocational Technology (Ratmalana), with hands-on enterprise experience at Delko Technologies (Sri Jayawardenepura Kotte). My focus is shifting towards multi-vendor network programmability — transforming manual CLI operations into asynchronous, event-driven automation pipelines.

Previously served as an Internship Trainee at the University of Colombo NOC, resolving fiber optic and Layer 2/3 issues in a live campus environment. Certified across Cisco (CCNA), Microsoft Azure, and ISC2 Cybersecurity domains. Based in Kandy, Sri Lanka — originally from Halloluwa, Kandy.

git log --graph --all --oneline --tags

Ongoing

B.Tech Network Tech

Apr 2022 – Dec 2026

Internship (NOC)

Feb '25 – Aug '25

Trainee NE (Delko)

Oct '25 – Nov '25

Promoted

Junior NE

Dec '25 – Apr '26

Certified

CCNA

Mar 2026 – Active

HEAD

Network & Sys. Eng.

Apr '26 – Present

Network & Systems Engineer

ONGOING

Delko Technologies

Apr 2026 – Present

CCNA Certification

CERTIFIED

Cisco Systems, Inc.

Mar 2026 – Active

Junior Network Engineer

PROMOTED

Delko Technologies

Dec 2025 – Apr 2026

Trainee Network Engineer

Delko Technologies

Oct 2025 – Nov 2025

Internship Trainee (NOC)

COMPLETED

University of Colombo

Feb 2025 – Aug 2025

B.Tech Network Technology

ONGOING

University of Vocational Technology

Apr 2022 – Dec 2026

cat skills.json

networking

• Routing & Switching (L2/L3)
• Multi-vendor Firewalls
• SonicWall · Fortinet
• Wireless AP Deployment
• Aruba · HPE · BDCom · Cisco
• Grandstream Switches & APs
• IP CCTV Systems
• DNS / DHCP / TCP-IP

automation_devops

• Python (Netmiko, Paramiko)
• Ansible & YAML Playbooks
• Git / GitHub
• Docker / Containerization
• Network Programmability
• RESTCONF / NETCONF
• Async SSH Operations
• Event-driven Workflows

security

• RADIUS / AAA Access Control
• Windows NPS Configuration
• ISC2 Certified (CC)
• Threat Landscape Analysis
• Incident Response
• Firewall Policy Management
• Syslog (Graylog/Ubuntu)
• Vulnerability Assessment

infrastructure

• Windows Server Admin
• Linux Server (Ubuntu)
• VMware ESXi
• TrueNAS Scale (iSCSI/NFS)
• Active Directory
• Virtualization
• GNS3 / EVE-NG Labs
• Wireshark / Nmap

ls /var/www/projects

project_01

PCIRS_Engine

Predictive Change Impact & Risk Simulation Engine

● Active

A multi-vendor DevNetOps dashboard built with Python, Netmiko, and Paramiko that centralizes network management, backups, and deployments into a single pane of glass. The core engine features a locally hosted LLM pipeline that preemptively validates configuration candidates for syntax accuracy, routing logic, and security vulnerabilities prior to execution. Couples AI-driven risk assessment with high-concurrency SSH interactions, proactive alerting, and automated rollbacks.

PythonNetmikoParamikoLLM PipelineSSHMulti-vendor

▶ CLICK TO VIEW DEMO

pcirs_engine.py

# Validate config payload via AI before push
def validate_candidate(config, model):
    result = llm_pipeline.analyze(
        config,
        checks=["syntax", "routing_logic", "security"]
    )

    if result.risk_score > 0.8:
        raise RiskThresholdError(result.findings)

    conn = netmiko.ConnectHandler(**device)
    conn.send_config_set(config)

    if not verify_baseline(conn):
        conn.send_command("rollback")
        return "Rollback triggered"

    return "Deployed successfully ✓"

project_02

AegisOps-NMS

Distributed Event-Driven Network Management System

● In Progress

A distributed NMS built with React, Go, and Python. Leverages RabbitMQ to decouple the API gateway from execution nodes, enabling concurrent zero-downtime bulk operations across multi-vendor infrastructure. The backend features an async Python worker pool using Netmiko + PySNMP for non-blocking CLI parsing and SNMP polling. Secured by an AES-encrypted PostgreSQL credential vault with strict RBAC, streaming live telemetry via WebSockets.

ReactGoPythonRabbitMQPySNMPWebSocketsPostgreSQL

▶ CLICK TO VIEW DEMO

project_03

Network Automation — Bulk Config

Python scripts using Netmiko and Ansible to automate bulk configuration changes on multi-vendor switches (HPE, Cisco, Aruba, BDCom), reducing manual task time by 60%.

PythonNetmikoAnsibleYAML

project_04

Centralized Auth (RADIUS/NPS)

Configured Windows NPS (RADIUS) for secure SSH access control across legacy HPE Comware and modern Aruba OS environments, enforcing AAA policy across campus-grade infrastructure.

Windows NPSRADIUS/AAAHPE ComwareAruba OS

project_05

Log Management — Graylog SIEM

Implemented a centralized Syslog server using Graylog on Ubuntu for real-time security incident detection and network performance analysis across enterprise client sites.

GraylogUbuntuSyslogSIEM

project_06

VMware ESXi / TrueNAS Infra

Built VMware ESXi server infrastructure with TrueNAS Scale providing reliable iSCSI and NFS shared storage for virtualization workloads in a homelab/enterprise environment.

VMware ESXiTrueNASiSCSINFS

find . -name "*.cert"

CISCO

[Issued: Mar 2026]

Cisco Certified Network Associate

#CCNA

MICROSOFT

[AZ-104]

Azure Administrator Associate

#AZURE

ISC2

[Issued: Sep 2024]

Certified in Cybersecurity (CC)

#CYBERSEC

ENGENIUS

[ENP]

EnGenius Certified Network Prof.

#WIRELESS

HPE ARUBA

[Aruba]

Aruba Networking Essentials

#NETWORK

NETACAD

[Cisco NetAcad]

Introduction to Cybersecurity

#SECURITY

CISCO

[Issued: Mar 2026]

Cisco Certified Network Associate

#CCNA

MICROSOFT

[AZ-104]

Azure Administrator Associate

#AZURE

ISC2

[Issued: Sep 2024]

Certified in Cybersecurity (CC)

#CYBERSEC

ENGENIUS

[ENP]

EnGenius Certified Network Prof.

#WIRELESS

HPE ARUBA

[Aruba]

Aruba Networking Essentials

#NETWORK

NETACAD

[Cisco NetAcad]

Introduction to Cybersecurity

#SECURITY

tail -f /var/log/sys_memories.log

View Full Archive →

grep -r "endorsements" .

Mr. Rajitha Wedage

Lecturer (Prob.), Dept. of Network Technology

University of Vocational Technology

Academic reference for B.Tech in Network Technology.

☎ +94 716 570 701 ✉ [email protected]

Mr. Rusiru Dalpathadu

Assistant Network Manager, NOC

University of Colombo

Professional reference for NOC infrastructure internship.

☎ +94 715 435 363 ✉ [email protected]

./establish_connection.sh

Currently open to discussing DevNetOps architecture, automation frameworks, multi-vendor network projects, or potential career opportunities. Let's build something reliable.

[email protected]

phone

+94 701 986 009

location

Colombo District, Sri Lanka

✉ Email Me ⌥ GitHub in LinkedIn

Hi, I'm Buddhisha.

/usr/bin/whoami

cat skills.json

networking

automation_devops

security

infrastructure

ls /var/www/projects

PCIRS_Engine

AegisOps-NMS

Network Automation — Bulk Config

Centralized Auth (RADIUS/NPS)

Log Management — Graylog SIEM

VMware ESXi / TrueNAS Infra

find . -name "*.cert"

tail -f /var/log/sys_memories.log

grep -r "endorsements" .

Mr. Rajitha Wedage

Mr. Rusiru Dalpathadu

./establish_connection.sh

Hi, I'm
Buddhisha.