System Administration

• Designed, deployed, and maintained 10 PostgreSQL and MS SQL servers on Ubuntu Linux VPS, ensuring optimal server performance and reliability.
• Enhanced data security by implementing 1,000 RBAC rules for developers, application instances, PostgreSQL, MS SQL, and other Linux servers, preventing unauthorized access; documented with Ansible automation.
• Managed 30 Ubuntu Linux VPS instances, implementing disaster recovery strategies and ensuring optimal network configurations.
• Prevented security breaches by leading access management initiatives, utilizing M365, 1Password, Red Hat SSO, and OKTA SSO.
• Managed and troubleshooted 8 WireGuard VPN and IPSEC VPN connections, ensuring secure communication across Google Cloud and Linux systems.
• Administered network infrastructure for over 1,000 servers, ensuring optimal system deployment, security, and troubleshooting.
• Configured and deployed 1,000 Wi‑Fi routers, improving network accessibility and performance for clients.
• Administered 100 Bare Bone servers, physical networks, and IP telephony systems, ensuring robust infrastructure for company growth.
• Administered 40 websites on Ubuntu Linux hosting servers with Apache and Nginx, ensuring high availability and performance.
• Provided round‑the‑clock 24/7 infrastructure support for an IPTV/OTT streaming platform, administering ~1,000 servers plus client‑owned systems for global customers in China, the US and Germany.
• Ensured uninterrupted delivery of IPTV streaming signals between suppliers and clients, monitoring and maintaining the streaming network and IP telephony around the clock.
• Planned and implemented new infrastructure functionality for internal and external systems, building solutions durable enough to still run years later with minimal change.
• As one of the first hires, designed and built the entire core infrastructure and supporting processes from scratch for a green‑energy SaaS startup, laying the foundation for rapid growth.
• Integrated a company‑wide password‑management system, strengthening security and streamlining access control.
• Built the company's own infrastructure as 19 Ansible playbooks and 34 roles across 12,065 lines of YAML, converging a live host to a declared state with every play idempotent.
• Ran the whole company on one 512 MB single‑core host — a git forge, a web server serving seven domains, Tor, two alternate‑protocol servers, backups and intrusion banning — by treating 464 MB of usable memory as the binding architectural constraint.
• Found and closed three SSH brute‑force protections that had never worked: a ban jail watching port 22 while the daemon listened on 1986, a rate limit shadowed by a broader rule above it, and a ban action whose binary never resolved, so no ban had ever applied.
• Hardened SSH to 24 asserted directives with three‑stage validation — the candidate file, the assembled config, then the daemon's own read‑back — after the read‑back caught the running server silently overriding two of the twenty‑four.
• Deployed the company's own git forge on Soft Serve, private by default with no web panel and its SSH port bound to loopback behind a jump host, and made the landing page in front of it a build artefact of the main site rather than a hand‑kept copy.

This work is part of what we offer as System Administration, Networking & VPN Setup, Security & Access Management, Site Reliability & Monitoring, Infrastructure as Code, Cloud Infrastructure & Migration, DevOps & CI/CD Automation and Platform & Solution Architecture.

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