# Sushen Jayasuriya

> Systems Engineering Undergraduate specializing in Enterprise Infrastructure, IBM Power Systems, Virtualization (Proxmox VE & VMware ESXi), and High-Availability Network Architecture.

## Profile Summary
Sushen Jayasuriya is a Systems Engineering Undergraduate at SLIIT (Sri Lanka Institute of Information Technology) with deep practical expertise in enterprise server virtualization, high-availability architecture, Linux/AIX administration, and Cisco network routing. He operates an active 3-node Dell enterprise homelab and is focused on architecting resilient, production-grade infrastructure.

- **Primary Specialization:** Enterprise Infrastructure & Systems Engineering
- **Secondary Domains:** Server Virtualization, Network Engineering (CCNA), Homelab Operations, Java/Android Development
- **Location:** Colombo, Sri Lanka
- **Portfolio Website:** https://sushenjayasuriya.org.lk/
- **Interactive Homelab Dashboard:** https://sushenjayasuriya.org.lk/lab
- **Official Resume / CV:** https://sushenjayasuriya.org.lk/cv/Sushen_Jayasuriya_CV.pdf

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## Core Technical Competencies

### Enterprise Systems & Hardware
- **Platforms:** IBM Power Systems (Power5 / Power6), Dell PowerEdge Rack Servers, x86_64 Enterprise Hardware
- **Operating Systems:** Red Hat Enterprise Linux (RHEL), Debian, Ubuntu Server, IBM AIX, Windows Server
- **Storage:** ZFS Pools, NFS / iSCSI Shared Storage, TrueNAS CORE, Hardware RAID (PERC H730)

### Virtualization & Hypervisors
- **Hypervisors:** Proxmox VE (3-node HA Cluster with Corosync & Ceph/ZFS), VMware ESXi / vSphere
- **Containerization:** Docker, Docker Compose, Linux Containers (LXC)
- **High Availability:** VM failover, quorum management, automated snapshots and PBS (Proxmox Backup Server)

### Networking & Security
- **Certifications & Routing:** Cisco CCNA (Enterprise Networking, Security, and Automation), MikroTik RouterOS (OSPF, BGP, Static Routing)
- **Firewalls & Security:** pfSense / OPNsense Firewall, VLAN Segmentation, WireGuard VPN, OpenVPN, Snort IDS/IPS
- **Network Services:** DNS, DHCP, Pi-hole Ad-blocking, Keycloak IAM, Nginx Reverse Proxy with TLS/SSL

### DevOps, CI/CD & GitOps
- **CI/CD & GitOps:** ArgoCD (GitOps declarative continuous delivery), Jenkins, GitHub Actions, Docker, Docker Compose, Linux Containers (LXC)
- **Configuration Management:** Ansible, Bash Automation Scripts, Systemd Service Engineering

### Observability & Monitoring
- **Metrics & Dashboards:** Prometheus (PromQL metrics scraping & node exporters), Grafana (Custom Telemetry Dashboards), Uptime Kuma, Zabbix

### Software Development & Databases
- **Languages:** Java (Core, Android SDK), Bash Shell Scripting, Python, C#, SQL
- **Frameworks & Databases:** Firebase (Firestore / Auth / Cloud Storage), MySQL, PostgreSQL, SQLite
- **Tools:** Git, GitHub, Linux Systemd, Chrony NTP, Keycloak IAM, ThingsBoard IoT

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## Enterprise Homelab Infrastructure (/lab)
Sushen maintains and administers an enterprise-grade home laboratory used for continuous deployment, virtualization testing, and network simulations:
- **Node 01 (Dell PowerEdge R730xd):** 2x Intel Xeon E5-2680 v4 (28C/56T), 128GB ECC DDR4, 12x 4TB SAS ZFS Array — Primary virtualization compute & storage.
- **Node 02 (Dell PowerEdge R630):** 2x Intel Xeon E5-2660 v3 (20C/40T), 64GB ECC DDR4, 4x 1TB SSD ZFS Mirror — Kubernetes, Docker Swarm, and CI/CD runners.
- **Node 03 (Custom 1U MicroServer):** Intel Xeon E-2224, 32GB ECC RAM — Backup controller, pfSense routing gateway, and Proxmox Backup Server.
- **Network Topology:** 10GbE SFP+ DAC Interconnects, managed 802.1Q VLAN trunking across Management (VLAN 10), Compute (VLAN 20), Storage (VLAN 30), and DMZ (VLAN 99).
- **Interactive 3D Rack Simulator:** Accessible live at https://sushenjayasuriya.org.lk/lab

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## Featured Projects

### 1. EventLK — Community & Corporate Event Management Platform
- **Type:** Full-stack Android Application & Cloud Architecture
- **Tech Stack:** Java, Android SDK, Firebase Authentication, Cloud Firestore, Cloud Storage
- **Description:** Mobile platform for discovering, organizing, and managing events across Sri Lanka with real-time ticket booking, organizer analytics dashboards, and role-based access control.

### 2. IBM Power Systems Enterprise Lab & AIX Migration
- **Type:** Systems Engineering & Legacy Migration
- **Description:** Implemented LPAR virtualization on IBM Power architecture, configured AIX environment with shared processor pools, and established automated backup routines to NFS storage.

### 3. High-Availability Proxmox Cluster with 10GbE Storage Network
- **Type:** Infrastructure & Virtualization
- **Description:** Configured multi-node Proxmox VE cluster with ZFS replication, automated disaster recovery failover, and segregated storage traffic via dedicated 10GbE interfaces.

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## Education & Qualifications

- **B.Sc. (Hons) in Information Technology (Specializing in Systems Engineering)**
  - Institution: Sri Lanka Institute of Information Technology (SLIIT)
  - Modules: Enterprise Systems Architecture, Network Engineering, Operating Systems Internals, Cloud Computing, Distributed Systems
- **Cisco Certified Network Associate (CCNA)**
  - Specialization: Enterprise Routing, Switching, Wireless Essentials, and Network Security

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## Direct Links & Contact Details

- **Website:** [https://sushenjayasuriya.org.lk/](https://sushenjayasuriya.org.lk/)
- **Digital Business Card (vCard):** [https://sushenjayasuriya.org.lk/card](https://sushenjayasuriya.org.lk/card)
- **Homelab Command Center:** [https://sushenjayasuriya.org.lk/lab](https://sushenjayasuriya.org.lk/lab)
- **Official CV (PDF):** [https://sushenjayasuriya.org.lk/cv/Sushen_Jayasuriya_CV.pdf](https://sushenjayasuriya.org.lk/cv/Sushen_Jayasuriya_CV.pdf)
- **LinkedIn:** [https://www.linkedin.com/in/sushen-jayasuriya-297b74237](https://www.linkedin.com/in/sushen-jayasuriya-297b74237)
- **GitHub:** [https://github.com/sushenjayasuriya](https://github.com/sushenjayasuriya)
- **Email:** sushenjayasuriya@gmail.com