Lech Olszewski Email & Phone Number

Bydgoszcz, PL

Poland

• Led Azure IaaS, PaaS, and SaaS administration across European regions, managing cloud resource provisioning, virtual networks, and virtual machine deployment for enterprise infrastructure.
• Managed and optimized Active Directory services and Azure Entra ID, ensuring secure user authentication, network security, and data integrity across multi-site environments.
• Delivered IT infrastructure transformation projects, migrating from legacy systems to cloud solutions, aligning with business goals and performance needs.
• Automated critical workflows using PowerShell, improving operational efficiency and reducing manual workload.
• Managed on-prem infrastructure, administering Windows Servers, Hyper-V, and VMware ESXi, ensuring peak performance, security, and compliance.
• Directed cloud adoption initiatives aligned with the Cloud Adoption Framework (CAF), optimizing governance and cloud strategy.

• Spearheaded the implementation of Azure AD B2C, improving user authentication and authorization processes across the organization.
• Managed Azure Active Directory (Microsoft Entra ID), ensuring robust identity and access management.
• Led Proof of Concept (PoC) projects, validating the feasibility of new cloud solutions and enhancing decision-making for cloud strategies.
• Directed cloud adoption initiatives aligned with the Cloud Adoption Framework (CAF) to optimize cloud strategy and governance.
• Oversaw the deployment, management, and monitoring of Azure cloud-based solutions, ensuring high availability and performance.
• Designed and implemented advanced network scenarios, including hub-spoke topology, improving connectivity and security.

Bydgoszcz, woj. kujawsko-pomorskie, Polska

• Managed On-Premises and Azure Active Directory, ensuring seamless user management and integration.
• Oversaw Active Directory Certificate Services (ADCS) and Public PKI, ensuring network security and data integrity.
• Administered ESXi hypervisors and Hyper-V, optimizing VM deployment, enforcing security, and ensuring peak performance.
• Conducted security assessments aligned with NIST SP 800-115 to strengthen defenses and mitigate risks.
• Automated tasks using PowerShell scripts, enhancing operational efficiency.
• Expert in Azure infrastructure administration, managing scalable cloud solutions.

• Customer: Achmea
• Maintained a PowerShell-based IaaS solution (VM user request portal), streamlining virtual machine provisioning and management to enhance operational efficiency.
• Administered multiple Active Directory (AD) domains, ensuring centralized user management and authentication across the enterprise.
• Proactively monitored system health using Microsoft SCOM, ensuring timely issue detection and resolution for optimal system performance.
• Collaborated with technical partners and vendors, leading infrastructure design, troubleshooting, and improvements, fostering a culture of innovation and collaboration.
• Implemented and maintained Windows Servers, Hyper-V, VMware, and Failover Clustering, ensuring a robust, reliable infrastructure that meets enterprise needs.

• Customer: NXP Semiconductors
• Created and maintained a PowerShell Module for a Citrix solution, reducing incidents by 40% through efficient automation and issue resolution.
• Served as the Single Point of Contact (SPOC) for 2nd line support, ensuring seamless incident resolution and escalation processes.
• Administered multiple Active Directory (AD) domains, centralizing user management and authentication across enterprise systems.
• Managed large-scale multi-site infrastructure in highly regulated environments, ensuring connectivity, compliance, and security for global operations.
• Oversaw Citrix environments, ensuring optimal performance, user satisfaction, and high availability of services.

• Applied advanced electrical engineering principles to install components, conduct conductivity tests, and guarantee the safe operation of rail vehicles.
• Conducted comprehensive rail vehicle heavy maintenance activities, ensuring operational integrity and safety compliance.
• Conducted thorough periodic inspections of rail vehicles, meticulously documenting findings to ensure compliance with safety standards and regulations.
• Demonstrated unwavering commitment in preparing, planning, and supervising installations for commercial cabling, adhering to strict standards and deadlines.
• Enforced stringent adherence to railroad rules and regulations to uphold safety protocols and ensure the smooth functioning of operations.
• Mastered the assembly and repair of sophisticated electrical/electronic components, maintaining peak performance and reliability in rail vehicle systems.