Open to new roles Chennai · India

Systems that work.

Senior Network Engineer · CCNA

I keep business networks fast, secure and online — SonicWall firewalls, VPNs, Cisco, Linux and Active Directory for 100+ users. Off the clock I'm sharpening my offence: ethical hacking on TryHackMe and Kali, and learning C to understand systems from the bottom up.

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01 — Experience

Where I work

Epicle Solutions Pvt. Ltd.

Chennai · May 2025 – Present
  1. Senior Network Engineer Promoted Sep 2026 – Present
  2. Network Engineer May 2025 – Sep 2026
  • Run the company's network infrastructure: SonicWall firewalls, VPNs, proxies, file servers and internal network services — firewall rules, content filtering, VPN access and proxy configuration.
  • Diagnose and fix production issues under pressure: VPN failures, DNS and path-access problems, ISP outages, firewall misconfigurations and slow network performance.
  • Set up and maintain a Graylog log server on Linux, with syslog collection and log rotation, for centralised logging and monitoring.
  • Manage the Active Directory user lifecycle — creation, access changes, password resets, deactivation — and support 100+ users on-site and remotely across departments and regional teams.
  • Support security and compliance: access reviews, endpoint tracking, activity monitoring and audit support.
  • OS installation, imaging and recovery; hardware diagnostics; HikVision CCTV; coordinating with ISPs and vendors to restore service during outages.
02 — Projects

Things I've built

Self-hosted homelab

A set of self-hosted services I run and maintain locally:

  • Nextcloud and Termix (server management) on a PostgreSQL backend.
  • Snipe-IT on MariaDB, which I use to track my own assets.
  • AdGuard Home for network-wide DNS filtering.
  • PostgreSQL
  • MariaDB
  • Nextcloud
  • Snipe-IT
  • AdGuard Home
  • Termix

Graylog log server

Installed and configured a Graylog server on Linux to centralise logs over syslog, with log rotation so storage stays under control. I maintain it as part of day-to-day operations.

  • Graylog
  • Linux
  • syslog

Pharmacy Management System

A simple pharmacy management application in Python with an SQLite3 backend, focused on practical data handling — stock, records and lookups.

  • Python
  • SQLite3

rdt — Reddit media downloader Archived

A Bash CLI that fetched media from Reddit posts. Built step by step to handle filename collisions, shell-quoting edge cases and inconsistent variable expansion. Usage: rdt <link>.

No longer works — Reddit tightened its security and access rules.

  • Bash
  • CLI
03 — Skills

What I work with

Networking

Firewalls, routing, VPNs, HTTP and SOCKS proxies (including self-hosted), DHCP, DNS, TCP/IP, proxy filtering, network troubleshooting.

  • SonicWall
  • Cisco
  • WireGuard
  • HTTP proxy
  • SOCKS5
  • Squid
  • Cloudflare

Systems

Linux (Arch daily driver, comfortable across distros), Windows, server administration, log management, self-hosting apps on PostgreSQL and MariaDB.

  • Arch Linux
  • Active Directory
  • Proxmox
  • PostgreSQL
  • MariaDB
  • Office 365

Security

Log monitoring, access reviews, activity monitoring, audit support, network reconnaissance.

  • Graylog
  • Kali Linux
  • Nmap
  • TryHackMe

Automation

Scripting repetitive work away, plus basic container management with Docker and Podman.

  • Bash
  • Python
  • Docker
  • Podman
  • n8n
04 — Now learning

What I'm working on

Where I'm heading next: deeper into security, and down to the metal with C.

C programming

Learning C to understand how software really talks to memory and the OS — pointers, memory management, and building small command-line tools. It's also the foundation for exploit development and reverse engineering.

$ gcc -Wall -o hello hello.c
$ ./hello
Hello, world.
# projects land on GitHub as they're ready

Ethical hacking

Building an offensive-security practice on TryHackMe and in Kali Linux labs — reconnaissance, enumeration and understanding how attacks work so networks can be defended against them.

  • TryHackMe
  • Kali Linux
  • Nmap
  • Recon

Completed: TryHackMe Pre Security · Ethical Hacking & Cyber Security (Technobytes)

05 — Credentials

Certifications & education

Cisco Certified Network Associate (CCNA)

Cisco · 2023

Ethical Hacking & Cyber Security

Technobytes Technologies · Apr 2025

ID: TB-TWS'25-MEA25-EH-087

Pre Security

TryHackMe · Mar 2025

ID: THM-AI7FM0WXDW ↗

B.Tech, Information Technology

Dr. Sivanthi Aditanar College of Engineering · 2020–2024

06 — Contact

Let's talk

Open to network engineering and security roles. Email is best for anything formal; WhatsApp for a quick message. I reply within 1–2 business days.

Email

[email protected]
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WhatsApp

For a quick message.
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Résumé

One page, print-ready.
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LinkedIn

in/jerome-goldwin
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GitHub

Jerome-Goldwin
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