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Available for hire · Dublin, Ireland

Rafal
Sadowski

Network Designer & IT professional with expertise in Linux, Cisco, cloud infrastructure, and systems administration. I believe great systems are built through people. I focus on building relationships, sharing knowledge, and growing alongside others.

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Who I Am

About Me

Experienced Technical Support Analyst with a demonstrated history of working in the information technology and services industry. Skilled in network design, Linux administration, storage systems, and virtualisation, with a strong foundation in project management and budgeting.

Honours Bachelor in Computer Science focused on IT Management, Networking, and Cloud Architecture from TU Dublin — Tallaght. Over 20 years of hands-on IT experience spanning enterprise support at Dell Technologies, freelance infrastructure projects, and public sector roles.

Location Dublin, Ireland
Phone +353 877 556 749
Avail. Immediate
Lang. EN / PL

What I've Built

Significant Projects

WiFi Routing Mesh Network

Designed and deployed a distributed internet connection system allowing multiple users to share a single ISP connection across different locations using open-source Linux routing protocols.

Linux B.A.T.M.A.N-adv OLSR

Private Cloud Solution

Built a private cloud storage solution using freeNAS and ownCloud for encrypted, large-volume SAN/NAS storage accessible via the internet from desktops, browsers, and mobile devices.

freeNAS ownCloud ZFS RAID

Unified AI Platform

Built a unified platform that queries multiple AI models at once, compares results, and selects the best answer—cutting costs via direct APIs while keeping full transparency and conversation history in one interface.

HTML/CSS/Python Multi-LLM

What I Know

Skills & Abilities

Technical Skills

Linux Administration
Cisco LAN/WIFI Networking Administration
VMware/Hyper-V Administration
Storage Systems Administration
Windows Server Administration
Cloud Architecture / DevOps
Python / Html / Css / Java / Scripting / Automation
Project Management

Courses

CCNA Routing and Switching · TU Dublin Computer Science
Cisco CCNA Wireless (200-355) · Dell EMC
Dell EMC Networking Campus Config & Admin · Network Academy
FC 101/102 Introduction to Fibre Channel Concepts · Dell EMC
Hyper-V Bare Metal Windows 2016 · Dell EMC
ITIL V3 · TU Dublin Computer Science
Introduction to Dell Networking OS10 · Dell EMC
Linux Admin Part 1 & 2 (LPIC) · Dell EMC
Microsoft Windows Server 2012 Managing a Server Environment
PRINCE2® - PRojects IN Controlled Environments
VMware NSX & NSX-T ICM · vSAN Troubleshooting · vSphere ICM

Certifications

CCNA
CompTIA Linux+
Linux Professional Institute
CompTIA Storage+
Dell EMC Information Storage and Management
Prince2
SNIA Storage Professional
VMware Certified Professional - DC Virtualization
VMware vSphere 6.5

Interests

🤿 Diving
🚲 Bicycle
🏊 Swimming
🎾 Tennis

Academic Background

Education

2021

Diploma, Business Innovation & Digital Transformation

TU Dublin Computer Science

Professional Development

2020 – 2021

Diploma, Dev Ops

CCT College Dublin

Activities and societies: Docker, Kubernetes, Cloud

DevOps combining cultural philosophies, practices, and tools to deliver applications at high velocity — containers, CI/CD, cloud-native infrastructure.

Diploma awarded

2012 – 2016

Honours Bachelor in Computer Science

TU Dublin Computer Science

IT Management / Networking / Cloud Architecture

Degree awarded

2009 – 2012

Bachelor's degree, International Hospitality & Tourism Management

Technological University Dublin

Degree awarded

Career History

Work Experience

Out of Hours Storage & Networking Support

Dell Technologies · Dublin, Ireland

April 2021 – Present · 5 yrs 1 mo

Provide out-of-hours escalation support for enterprise storage and networking incidents, ensuring SLA compliance for global customers
Diagnose and resolve critical issues across Dell EMC PowerStore, PowerMax, Unity, Isilon, and EqualLogic storage platforms
Perform root cause analysis on SAN/NAS failures, fibre channel fabric issues, and network configuration anomalies
Analyse performance data and system logs to identify bottlenecks and recommend proactive remediation steps
Collaborate with on-call engineering teams across EMEA, APJ, and Americas to coordinate rapid incident resolution
Document troubleshooting procedures and contribute to internal knowledge base, reducing repeat escalations by standardising resolution paths

Senior Analyst

Dell Technologies · Cherrywood, Dublin

December 2018 – April 2021 · 2 yrs 5 mos

Led technical escalations for Tier-2 and Tier-3 storage cases, mentoring junior analysts through complex problem-solving workflows
Conducted in-depth data analysis and trend reporting to identify recurring customer pain points and feed back to engineering teams
Managed VMware vSphere and vSAN environment troubleshooting for enterprise virtualisation customers
Completed advanced certifications in VMware VCAP 6.5, NSX-T, and vSAN to support increasingly complex customer environments

Enterprise Technical Support Analyst

Dell Technologies · County Dublin, Ireland

January 2017 – December 2018 · 2 yrs

Delivered Tier-1 and Tier-2 technical support for enterprise networking and storage products to international enterprise clients
Configured and troubleshot Cisco and Dell switching environments, resolving VLAN, spanning tree, and routing issues
Completed CCNA, CompTIA Linux+, Storage+, and Dell EMC Associate certifications during this tenure

IT Engineer

Freelance Information Technology and Service · Dublin, Leinster, Ireland

2000 – 2016 · 16 yrs

Administration and configuration of Linux systems (OpenWrt, Gargoyle, Ubuntu, Debian)
Administration and network implementation (AP/Routers and Mesh routing protocols)
Installation and configuration of Windows desktop/laptop and Windows Server 2012, 2008
Installation, configuration and administration of ownCloud and FreeNAS storage solutions
Smart house installation and implementation
Cisco router and switches configuration

IT Technician

Health Service Executive (HSE)

February 2015 – August 2015 · 7 mos

Provided desktop and infrastructure support across HSE facilities, supporting clinical staff with hardware, networking, and software issues
Assisted with deployment and maintenance of Windows workstations in a regulated healthcare environment

Restaurant Supervisor

Ashdown Park Hotel · Gorey, Co. Wexford

September 2007 – June 2009 · 1 yr 10 mos

IT Engineer

Engineer's Computer Studio (ECS) · Poland

2003 – 2006 · 3 yrs

Computer assembly
Installation and configuration of computer networks
Installation and configuration of Microsoft Windows servers and desktops
Installation and configuration of Microsoft Office
Installation and configuration of Linux access points and routers
Customer care

Let's Talk

Contact Me

Get In Touch

I am currently open to new opportunities. Whether you have a position, a project, or just want to connect — I would love to hear from you.

Dublin, Ireland
+353 877 556 749
rafal1509@gmail.com

📞 Contact Hours

+353 877 556 749
Mon–Fri: 09:00–22:00 · Sat–Sun: 10:00–18:00
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