WARREN
COX

DIGITAL . SPACE . TECH

About

Senior Technical Engineer with 18+ years of IT infrastructure experience. Proactive and dependable professional with strong troubleshooting skills and a passion for continuous learning.

Quick to grasp new concepts and technical skills, with a particular interest in automation technologies that streamline complex tasks and ensure accuracy. Specializing in mission-critical infrastructure, Linux systems administration, and cloud technologies.

Experience

Senior Technical Engineer

Phoenix47 • Full-time
Aug 2025 - Present • 7 months

Delivering specialized 3rd line support to a global portfolio of IT service clients. Managing complex technical infrastructure and ensuring service excellence.

Senior Linux Systems Administrator

Rocketseed • Full-time
Jul 2023 - Aug 2025 • 2 years 2 months

Responsible for deployment, stability, and support of core infrastructure for a global email marketing software company. Expertise in Office 365 Administration and Google Workspace.

System Administrator

Telasera Technologies • Full-time
May 2019 - Jul 2023 • 4 years 3 months

Full-Stack Infrastructure Management: engineered and administered hybrid server environments, deploying and maintaining physical hardware (Windows Server) and virtual machines using Proxmox.

Information Technology Support Specialist

Morton & Partners Radiologists • Full-time
Feb 2007 - Mar 2019 • 12 years 2 months

Served as key IT Specialist for a leading medical radiology practice, ensuring stability, security, and performance of mission-critical IT infrastructure. Specialized in AD support, DHCP, DNS, VPN, routers, switches, and firewalls.

Skills & Expertise

Linux Administration
Proxmox
Active Directory
Office 365
Google Workspace
Mikrotik
Network Administration
Firewall Management
Infrastructure Design
Troubleshooting
Mission-Critical Systems
Automation

Projects

Mail Infrastructure

Production-grade mail server with SPF, DMARC, and DKIM authentication. Full email delivery stack.

Web Deployment

Modern, responsive web presence with HTTPS, security headers, and performance optimization.

Proxmox Virtualization

Deployed and managed multiple LXC containers for services. Automated provisioning and lifecycle management.

Network Security

Configured UFW firewall, SSH hardening, port forwarding, and access control across LAN and public-facing services.

Container Management

Built isolated environments for mail, web, and utilities. Managed networking, storage, and resource allocation.

DNS & Domain Setup

Configured DNS records (A, MX, DKIM, SPF, DMARC). Managed domain delegation and SSL certificates.

SSL/TLS Certificates

Automated certificate issuance and renewal with Let's Encrypt. Multi-domain support with CT logging.

Security Hardening

Implemented CIS Benchmarks security hardening across infrastructure. Firewall policies, access control, and network segmentation.

Contact

Get in touch via email or WhatsApp. Looking forward to hearing from you!