Łukasz

Senior Admin / Team Lead

Hart sp. z o.o. | Opole | 01.2023 – Present

📌 Key Responsibilities & Operations

• Infrastructure & Cloud Administration: Manage and optimize hybrid infrastructure environments. Administer on-premise systems and cloud resources via Microsoft Azure, leveraging Service Principals, Key Vault for secret management, and Document Intelligence for advanced data extraction.
• Network Security & Edge Architecture: Design, deploy, and maintain robust network security boundaries and load-balancing topologies. Manage Sophos and Fortigate firewalls, alongside HAProxy (Local/OCI with auto-SSL) and Keepalived to ensure secure, highly available traffic routing.
• Cybersecurity & Compliance: Safeguard enterprise assets by administering a comprehensive endpoint security and centralized SIEM/audit ecosystem utilizing ESET, Wazuh Expert 2.0 practices, and Cynet.
• Storage, Backup & Disaster Recovery: Oversee enterprise data lifecycle management. Operate Huawei OceanStor arrays and execute resilient backup and DR strategies using Synology, NAKIVO, and Proxmox Backup Server (PBS).
• CI/CD & Container Orchestration: Manage source control and continuous integration/continuous deployment pipelines. Oversee containerized environments using Docker Swarm, standalone Docker, and Jenkins to maintain deployment agility.
• Automation & Scripting: Eliminate manual toil by developing custom management tools and automated workflows across Entra ID, Active Directory, Proxmox, Jira, and databases utilizing PowerShell, Python, Bash, and .NET/C#.
• ITSM, Asset Management & Collaboration: Administer the Atlassian Cloud suite (Jira Service Management, Confluence), GLPi for IT asset management, and oversee enterprise collaboration platforms like Microsoft SharePoint.

🚀 Notable Projects & Initiatives

• Virtualization Fleet Overhaul (Hyper-V to Proxmox)
  Spearheaded the complete migration of the company's virtualization infrastructure from Hyper-V to Proxmox*
  Architected and deployed dual 3-node Proxmox High-Availability (HA) clusters alongside standalone nodes, ensuring zero single points of failure and significantly improving resource efficiency.

• Unified Observability & Monitoring Ecosystem
  Architected and deployed a highly available Zabbix Cluster integrated with a distributed network of cloud and on-premise Proxies to guarantee comprehensive, global infrastructure visibility.
  Engineered multiple production-grade Elastic Stack ecosystems. Incorporated Fleet Server for centralized agent management and APM servers for deep application performance monitoring, enabling real-time cross-platform analytics and proactive incident response across hybrid environments.

• DevOps Pipeline Migration
  Led the strategic migration of version control and CI/CD operations from Azure DevOps to GitHub, effectively utilizing GitHub Actions and GitHub Packages to streamline development workflows and standardize artifact management.

• File Management Migration (DSM to SharePoint)
  Executed a seamless, company-wide data migration from legacy Synology DSM environments to Microsoft SharePoint, modernizing file sharing, collaboration, and document retention policies.

• Zabbix AI Analyzer (Custom Tooling)
  Repository: github.com/tulonbaar/zabbix-ai-analyzer
  Designed and deployed a middleware proxy using Azure Functions (Python v2 model) to bridge the gap between the Zabbix API and Azure AI Foundry.
  This application automates IT operations by fetching real-time incident context—including events and triggers—and forwarding enriched data to an AI Agent for intelligent, multi-step triage and analysis.

• Pulsebook (Custom Tooling)
  Repository: github.com/tulonbaar/pulsebook
  Developed a specialized platform to automate the generation and hosting of XML registries.
  Engineered to provide both static and dynamic endpoints, enabling reliable, real-time synchronization with VoIP hardware across the network.

📌 Key Responsibilities & Operations

• Production Systems Management: Managed the administration, continuous maintenance, and strategic development of mission-critical production systems, specifically ESKO WebCenter and Automation Engine. Ensured high availability, system stability, and optimal performance for daily operations.
• Full-Stack .NET Development: Led the end-to-end design, development, and deployment of robust, scalable software solutions utilizing the .NET ecosystem. Leveraged C#, ASP.NET Core, and Entity Framework to build modern, data-driven applications tailored to complex business requirements.
• API & System Integration: Architected and constructed seamless communication channels between disparate enterprise systems. Developed secure, high-performance RESTful APIs using ASP.NET Core to facilitate reliable data exchange and system interoperability.
• Specialized IT Support: Provided dedicated technical support for graphic design teams. Troubleshot domain-specific software issues, optimized workstation performance, and minimized downtime to keep creative and production workflows running smoothly.
• Continuous Process Improvement: Championed a culture of optimization by proactively identifying bottlenecks and introducing innovative technical solutions. Expanded existing toolsets and methodologies to streamline daily work processes and boost overall departmental efficiency.
• Workflow Automation: Engineered and deployed custom automation solutions to accelerate the production pipeline. Utilized JavaScript and the capabilities of the ESKO Automation Engine to replace manual tasks with automated workflows, significantly reducing human error and production lead times.
• Global B2B Collaboration: Acted as a technical liaison connecting the internal processes of Chespa Company with its international clientele. Gathered requirements and implemented integrated solutions that securely linked internal workflows with external client systems, ensuring smooth global operations.

📌 Key Responsibilities & Operations

• Career Progression & Team Leadership: Advanced from delivering ITIL-aligned First Line Support for three locations to successfully managing and mentoring a distributed L1/L2 support team. Entrusted with overseeing daily IT operations and service delivery across ten regional sites in Poland.
• Infrastructure & Asset Management: Maintained, troubleshot, and optimized local server and network infrastructures to ensure high availability and minimal downtime. Guaranteed the operational readiness and comprehensive lifecycle management of all corporate hardware, workstations, and mobile devices.
• IT Budgeting & Resource Allocation: Managed regional IT budgets, overseeing hardware procurement and vendor relations. Optimized financial resource allocation to deliver cost-effective, scalable technical solutions without compromising operational quality or security.
• Cross-Functional Collaboration: Partnered closely with core system administrators and infrastructure teams to support and maintain mission-critical warehouse and sales systems.
• Business Workflow Optimization: Actively contributed to the continuous improvement of departmental processes. Bridged the gap between IT capabilities and business requirements to streamline workflows and boost productivity across supported locations.