Linux · DevOps · Technical Lead

Wojciech Błaszkowski

Linux operations, automation and security that keep production stable.

Senior Linux Administrator / DevOps / Technical Lead with 25+ years across production and enterprise environments. Focused on service stability, automation, security and root cause analysis.

Strong in OS and application debugging, bottleneck analysis (CPU / IO / memory / network) and performance optimization — process-driven through change support, maintenance windows, standardization and documentation.

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Production operations & 24/7 on-call

Automation: Puppet · Ansible · Rundeck

Security patching & vulnerability mgmt

Wojciech Błaszkowski — professional portrait — Linux · DevOps · Security · Operations

01 Profile

Operations engineer who keeps services running

25+ years of Linux administration experience across production and enterprise environments — service stability, automation, security and root cause analysis, backed by process discipline: change/release support, maintenance windows, standardization and documentation.

02 Skills

What I do day to day

From operating systems and platforms to networking, automation and ITSM — focused on reliability, debugging and measurable performance.

Linux / System Engineering

Operations, standardization, hardening, performance.

Linux (RHEL/SLES/Ubuntu/Debian): operations, standardization, hardening
OS debugging: logs, systemd, service & dependency analysis
Performance tuning: CPU/IO/memory/network
Packaging / provisioning: custom images and .deb/.rpm

Application & Platform Debugging

Troubleshooting, regressions, bottlenecks.

Application debugging: runtime behavior, logs, regressions
Bottleneck analysis: profiling, metrics, logs
Metabase: operations, upgrades, troubleshooting
WordPress: performance, diagnostics, stability

Infrastructure / Virtualization / Storage

VMware, bare-metal, storage, data center operations.

VMware ESXi / NSX, Proxmox VE: clusters, change execution
Bare-metal (HPE): OneView, remote hands coordination
Hitachi HNAS: operator-level storage operations
NFS / Samba: shares, permissions, file services

Networking & VPN

Segmentation, troubleshooting, remote access.

VPN: OpenVPN, WireGuard, IPsec
Segmentation / DMZ: firewall & policy maintenance
UniFi stack: UDM, USW, UAP; VLAN, routing, policy
Network troubleshooting: latency, packet loss, app impact

DevOps / Automation / Security / ITSM

CI/CD, automation, vulnerability management.

Automation: Puppet, Ansible, Rundeck, Bash
CI/CD & release support: Jenkins, Azure DevOps, Git
Kubernetes / GitOps: Argo CD, kubectl, provisioning
Security ops: Qualys (VM), patching, mitigation
ITSM: ServiceNow, ITIL4, change management

Home lab

Continuous hands-on validation.

Ansible AWX (k3s-based) — playbook automation
Public cloud VMs — validating solutions & scenarios
Docker — containerized apps, upgrades, config
UniFi lab — VLAN, policies, segmentation testing

03 Experience

Two decades in production

Enterprise operations, hosting providers and client services — from L1–L3 support and on-call to automation of 800+ VMs and platform reliability.

Kyndryl — Senior Team Technical Lead / Senior Linux Administrator

Enterprise environments: operations, automation, security, production support

2021 – present

ITSM / ServiceNow: incidents, requests, changes workflow
ITIL4 / Change management: planning, risk assessment, maintenance windows, post-check
CI/CD & release support: Jenkins and Azure DevOps across dev/non-prod/prod
Qualys security operations: detections, reporting, mitigation
Kubernetes / GitOps: Argo CD, kubectl; provisioning and ops support
Automation / orchestration: Rundeck, Bash, Puppet-based automation (800+ VMs)
SUSE Manager / Red Hat Satellite: repos, patching, lifecycle management
VMware platform: ESXi clusters; NSX + Terraform (basics)
Observability: ElasticSearch, Kibana, rsyslog; 24/7 on-call

IBM — Advisory IT Specialist

Enterprise operations support and process-driven delivery

2021

ITSM / ServiceNow: operational work
ITIL4 / Change management: process-driven change support
Operations support: enterprise standards, escalations

LinuxAdmin.pl / SysGroup.pl — Administration / DevOps

Client services: automation, monitoring, hardening, patching, CI/CD

2018 – 2021

Ansible: configuration and deployment automation
Nagios: infrastructure and service monitoring
Security hardening: baselines, recommendations, standards
Patching: planning and execution of maintenance windows
CI/CD delivery and operational support; app & OS debugging

Domena.pl / Agnat Sp. z o.o. — Administrator / Support L1–L3 / On-call

Hosting provider: web, mail, backup, security + customer support, PLD Linux

2004 – 2018

End-to-end hosting operations: web, mail, backups, security
L1/L2/L3 support: diagnosis, escalations (30+ bare-metal servers)
On-call: incident handling outside business hours

DomainMaker — Administrator (Linux / domains / servers)

vServer, EPP (including NASK), server infrastructure

2008 – 2009

Linux virtualization: PLD Linux, Debian; VPS/vServer operations, Proxmox
EPP / domains: EPP operations including NASK EPP; integrations
Server hardware: Dell PowerEdge, Supermicro; administration and upkeep

Insignia — Administrator (volunteer)

Services for websites and file sharing

2008 – 2012

SVN (web): repositories, access, upkeep
Samba: file shares and permissions
LAMP: customer website environments maintenance

Klubowa.pl — Linux Administrator (volunteer)

(Quasi) HA LAMP stack

2007 – 2020

Quasi-HA: high availability approach and service continuity
LAMP stack: application environment administration and stability

04 Stack

Tools I reach for first

A quick map of the technologies behind day-to-day operations, automation and platform work.

SLESUbuntuDebianPLD LinuxRHEL

ITSM

ServiceNowITIL4Change management

CI/CD

JenkinsAzure DevOpsGit

Automation

PuppetAnsibleRundeckBash

Security

Qualys (VM)PatchingMitigation

Kubernetes

Argo CDkubectlCluster provisioning

VPN

OpenVPNWireGuardIPsec

UniFi

UDMUSWUAPVLAN

Virtualization

VMware ESXi / NSXProxmox VETerraform (basics)

Storage

Hitachi HNASLVMmdadm

Hardware

HPEDell PowerEdgeSupermicroHPE OneView

Apps & Domains

MetabaseWordPressEPP (incl. NASK)

Stability is not luck — it is automation, clear change processes and the discipline to find the real root cause instead of the quick fix.

— Wojciech Błaszkowski

05 Home lab

Where I keep skills sharp

A running environment for validating solutions, automation and network scenarios before they reach production.

Ansible AWX (k3s based)

Task automation and playbook execution in a controlled workflow.

Public cloud VMs

Test machines for validating solutions and scenarios.

Docker

Containerized apps — maintenance, upgrades, configuration.

UniFi lab

UDM/USW/UAP — VLAN, policies and segmentation testing.

06 Education

Computer Science foundations

University of Information Technology in Bydgoszcz

Computer Science — M.Sc. studies · 2011–2013

University of Information Technology in Bydgoszcz

Computer Science — B.Eng. studies · 2009–2011

Need someone who keeps Linux platforms stable and well documented?

Whether it is production operations, automation, security patching or platform reliability — let's talk about how I can help your team.

Get in touch

07 Contact

Let's connect

Reach out by phone or LinkedIn — happy to discuss operations, automation or a technical lead role.

The quickest way is a call or a LinkedIn message.

Choose whatever is convenient — I reply to every message personally.

linkedin.com/in/wojtosz github.com/wifibox Download CV (PDF)

English — professional Deutsch — basic Polish — native