sajal:~$

👋 Hi, I'm Sajal
Maharjan.

I keep servers, networks and phone lines happy — and I automate the boring parts with Ansible, GitLab CI and a little Python. ☕ Powered by chai.

01 / about

Infrastructure should be invisible when it works — and resilient when it matters.

Profile

I am a System & Network Administrator with four years of experience supporting enterprise IT infrastructure and network operations in an ISP environment. My work spans server administration, Microsoft 365 and Exchange, hosting platforms, PBX/VoIP, VPNs, Active Directory, virtualization, data-center operations, and network security.

4+ yrs IT & network operations
ISP enterprise environment
24/7 mission-critical mindset

Technical stack

Core platforms, technologies, and infrastructure domains:

Microsoft 365 Exchange Server Active Directory cPanel / WHM DNS PBX / VoIP StrongSwan IPSec VPN Cisco Meraki Cisco AnyConnect Site-to-Site IPSec SSL VPN FortiClient VPN Sophos VPN MikroTik VPN Cisco Juniper Extreme Fortinet MikroTik Sophos VPLS / MPLS
02 / experience

Hands-on across systems, networks, security and support.

2025 — PRESENT

Assistant System Administrator

WorldLink Communications
  • Administer PBX/VoIP systems and resolve voice-service, call-routing, and connectivity issues.
  • Manage Microsoft 365, Exchange, user provisioning, licensing, and mailbox administration.
  • Oversee cPanel/WHM hosting, domains, DNS, SSL certificates, and hosted infrastructure.
  • Configure and troubleshoot VPNs — StrongSwan IPSec, Cisco Meraki, Cisco AnyConnect, and router/firewall site-to-site and remote-access VPNs.
  • Deploy and manage virtual machines and perform server hardware upgrades and maintenance.
  • Support data-center operations including server and switch mounting, structured cabling, patching, and upgrades.
  • Administer Active Directory users, groups, access control, and infrastructure security updates.
WORLDLINK
2022 — 2025

Senior Enterprise Support Representative

WorldLink Communications
  • Resolved advanced enterprise issues involving mail servers, domains, site access, and connectivity.
  • Configured and supported Cisco, Juniper, Extreme Networks, Fortinet, MikroTik, and Sophos devices.
  • Worked with VPNs, firewalls, access-control policies, VPLS/MPLS, and enterprise connectivity.
  • Handled escalated Level 1/Level 2 tickets and complex internet troubleshooting.
  • Provided high-priority support for banks and financial institutions.
  • Installed wireless access points and provisioned new enterprise links.
WORLDLINK
03 / projects

Playbooks, pipelines & other things I automate so future-me doesn't have to.

🧭✓ shipped

Fleet DNS switch-over playbook

Ansible playbook run through GitLab CI that flips primary/secondary DNS across a mixed Linux fleet (Ubuntu, CentOS, RHEL, Alma). Auto-detects Netplan vs NetworkManager, with a fallback for minimal hosts and safe exclusions for DNS servers themselves.

AnsibleGitLab CINetplannmcli
🗂️⚙ in progress

LDAP server replacement

Replacing the existing LDAP server with a freshly automated OpenLDAP build — config, data restore and web account manager — deployed end-to-end from a GitLab pipeline.

OpenLDAPAnsibleGitLab CILAM
☎️⚙ in progress

FreePBX HA cluster

Designing a highly available FreePBX/Asterisk setup with SIP trunking so voice keeps flowing even when a node doesn't.

FreePBXAsteriskSIPHA
🛡️✓ shipped

LinkGuard

Python threat-intelligence tool that discovers and classifies suspicious domains (gambling, adult, phishing) automatically.

PythonThreat intelAutomation
🚫✓ shipped

Blocklist automation

Turns regulator domain lists into DNS RPZ blocklists for BIND, so compliance updates stop being a manual chore.

BINDDNS RPZScripting
📦✓ shipped

Inventory auto-filler

Python/openpyxl tool that fills in hardware specs on a NetBox server export so the spreadsheet stops being a treasure hunt.

PythonopenpyxlNetBox
🔐✓ shipped

Vendor-access VPN

StrongSwan IPSec VPN for third-party vendors, authenticating with EAP/RADIUS against Windows NPS.

StrongSwanRADIUSNPS

more on the way…

04 / education

The academic bit 🎓

Bachelor of Computer Applications (BCA) Mega National College, Tribhuvan University — Kumaripati, Lalitpur
Graduated 2025
05 / contact

Got an infra puzzle? Let's talk. 💬

Connect

Based in Thecho, Lalitpur. Reach me directly by email, phone, or LinkedIn.

call_me() linkedin ↗