Łukasz Kisiel

Łukasz Adam Kisiel

SysOps & IT Administrator

Elbląg, Poland Contact GitHub LinkedIn

Professional Summary

Senior IT professional with over a decade of experience in Linux system administration, on-prem infrastructure, and IT operations automation. Specialized in building and maintaining robust, secure on-premise environments with a focus on virtualization, high availability, and performance optimization.

Linux Servers Virtualization High Availability Ansible Bash Storage Solutions Networking Monitoring
$ cat skills.txt | grep -i "expertise"
> On-Prem Infrastructure
> Virtualization Platforms
> System Performance Tuning
> Infrastructure Automation

Experience

IT System Administrator @ Expereo
Jul 2022 - Present
Proxmox VMware Ansible Linux/Windows Atlassian Stack Ceph
  • Maintaining on-prem servers (Linux/Windows) and multiple cluster environments (Proxmox, VMware)
  • Preparing automation in Ansible and shell scripts for system administration tasks
  • Providing IT support for developers and end customers
  • Working with full Atlassian stack (Jira, Confluence, Bitbucket)
  • Implementation of Proxmox VE clusters with Ceph storage for high availability
  • System monitoring and alerting implementation
  • Storage performance optimization with Ceph cluster tuning
Senior IT Specialist @ Kyndryl
Nov 2021 - Jun 2022
Linux Middleware Bash WebSphere Cloud Foundry
  • Provided L2/L3 middleware support for developers
  • Maintained PaaS platform based on Cloud Foundry
  • Prepared bash scripts for automation of routine tasks
  • Management of enterprise middleware infrastructure on physical servers
  • Security hardening for WebSphere application servers
  • JVM performance optimization for business applications
Senior IT Analyst @ Nordea Markets
Sep 2019 - Nov 2021
Docker CI/CD Oracle Bash Jenkins Atlassian
  • Maintained variety of production and pre-production systems across different platforms (Windows/Linux)
  • Supported developers and QA teams with continuous deployment and integrations
  • Migrated production systems to Docker environment
  • Educated developers and teams on Docker adoption
  • Prepared automatic builds for Docker images triggered by Git commits
  • Worked with full Atlassian product stack (Bitbucket, Confluence, JIRA, Bamboo)
  • Analyzed complex data flows in Oracle database for upstream/downstream systems
IT Analyst @ Nordea Markets
Sep 2017 - Sep 2019
Docker CI/CD Oracle Bash Jenkins
  • Maintained production and pre-production systems across Windows and Linux platforms
  • Supported development teams with deployment and integration processes
  • Began migration of systems to Docker container environment
  • Worked with Oracle databases to analyze and optimize data flows
  • Developed bash scripts for automation of routine tasks
Associate Professional: Hosting/System Administrator @ DXC Technology
Apr 2017 - Aug 2017
Apache Tomcat JBoss SharePoint
  • Installed, configured and maintained various application environments
  • Worked with Apache HTTPD, Tomcat, JBoss application servers
  • Managed SharePoint environments
Associate Professional: Hosting/System Administrator @ CSC
Oct 2012 - Mar 2017
Apache Tomcat JBoss SharePoint
  • Installed, configured and maintained various application environments
  • Managed Apache HTTPD, Tomcat, and JBoss servers
  • Administered SharePoint environments
IT Administrator @ Alstom
Jan 2010 - Sep 2012
Apache Tomcat JBoss SharePoint
  • Installed, configured and maintained various application environments
  • Managed Apache HTTPD, Tomcat, and JBoss servers
  • Administered SharePoint environments
System Network Administrator @ Advertising Agency FLUSSO.pl
Jan 2006 - Dec 2008
Linux Networking
  • Linux system administration
  • Network infrastructure management
System Network Administrator @ Advertising Agency GABO S.C.
Apr 2007 - Oct 2008
Linux Networking
  • Linux system administration
  • Network infrastructure management

Technical Skills

Virtualization & Storage

  • Proxmox VE/VMware ESXi
  • KVM/Xen Virtualization
  • Ceph/GlusterFS
  • LVM

Automation & Scripting

  • Ansible
  • Bash
  • CI/CD Pipelines
  • Git/GitLab
  • Jenkins/Bamboo

Networking

  • TCP/IP, VLANs, VPN
  • Load Balancing
  • DNS/DHCP
  • Network Troubleshooting

Monitoring & Logging

  • Geneos
  • Prometheus/Grafana
  • ELK Stack
  • Syslog Management
  • Performance Tuning

Operating Systems

  • RHEL/Rocky
  • Debian/Ubuntu
  • Security Hardening

Databases & Middleware

  • Oracle
  • MySQL/MariaDB
  • Tomcat
  • Apache/Nginx
  • JBoss
  • SharePoint

Containerization

  • Docker/Podman
  • Container Orchestration
  • Image Optimization

Tools & Platforms

  • Atlassian Suite
  • Cloud Foundry
  • JIRA/Confluence
  • Bitbucket

Education & Certifications

Engineer's Degree, Applied Informatics @ The State University of Applied Sciences in Elbląg
2006 - 2010
Master's in Applied Informatics @ University of Warmia and Masuria in Olsztyn
2010 - 2012
RHCSA (Red Hat Certified System Administrator) @ Red Hat
2017 - 2021
Scrum Master Certified @ Vabro.ai
2019 - 2022