I’m interested in hiking, walking with the dog, and turn-based games
Michael Ratajczak
Research Sysadmin
Dublin
Summary
With a robust background in IT and cybersecurity honed at leading firms like Symantec, I am skilled in VMware Infrastructure and IT Security. My demonstrated success in deploying complex systems and enhancing operational efficiency showcases my technical proficiency and problem-solving skills. My proactive approach and ability to deliver under pressure make me a valuable asset to any team.
Overview
13
13
years of professional experience
2
2
years of post-secondary education
1
1
Certification
Work History
Research Engineer
Tenable
01.2022 - Current
- Performed software installations on Linux OS: applications on Oracle Linux, IBM WebSphere, Splunk.
- Diagnosed and executed resolutions for virtual networks on VMware virtual machines. Troubleshooting was done on the OS level, the Linux or Windows system.
- Cisco hardware was delivered to the Research team.
- Managed Research subnets and provided support to the team.
IT Support Technician
Tata Consultancy Services · Contract
07.2021 - 12.2021
- Interacted on AWS & VMware environments.
- Managed and troubleshooted DBs: MySQL, MariaDB, Sybase, MongoDB, PostgreDB.
- Monitored Application & Web Servers -Tomcat, Apache, IIS.
R&D Software Engineer
Broadcom
01.2020 - 10.2020
- Operated within an integrated and multi-cloud environment (AWS, GCP): supported and installed instances in the Cloud.
- Deployed web application (LimeSurvey) from the Docker registry running on Google Kubernetes Engine.
- Performed reports from the Elastic Stack and Grafana services.
- Managed Zabbix monitoring.
Security Response Systems Administrator
Symantec
11.2011 - 01.2020
- Enabled a new Security Response lab in Singapore, providing tax relief. Executed deploying hardware & software on-site successfully.
- Planned and executed the inversion project Security Response labs and modified KVM (keyboard, video, mouse) configuration. These changes expanded labs and increased employee satisfaction.
- Migrated 37 ESXi servers & 72 vSphere VMs to Vmware version 6 for moving on-premises servers to the cloud which reduced Total Cost of Ownership (TCO).
Education
Master of Science - Computing Networks And Distributed Systems
Poznan University of Technology
Poznan, Poland 10.2024 - 07.2026
Skills
VMware Infrastructure
Network Administrator
IT Security
Scripting in Bash
Certification
CompTIA Certification
Interests
Timeline
Master of Science - Computing Networks And Distributed Systems
Poznan University of Technology
10.2024 - 07.2026
CompTIA Certification
02-2024
Research Engineer
Tenable
01.2022 - Current
IT Support Technician
Tata Consultancy Services · Contract
07.2021 - 12.2021
R&D Software Engineer
Broadcom
01.2020 - 10.2020
Security Response Systems Administrator
Symantec
11.2011 - 01.2020
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