Pawel W.

Senior L3/L4 Infrastructure Engineer with 28+ years of hands-on experience supporting complex enterprise, MSP, healthcare, and hybrid environments. I specialize in Windows Server, Active Directory, Microsoft Azure, Microsoft 365, SQL Server, VMware, Hyper-V, backup and disaster recovery, networking, SCCM/MECM, and advanced infrastructure troubleshooting. My work focuses on solving problems that require more than standard administrative work. I help clients investigate complex production incidents, identify root causes, stabilize infrastructure, improve performance and reliability, and complete migrations, upgrades, and recovery projects with minimal business disruption. I have extensive experience working across multiple technology layers, including: • Windows Server, Active Directory, Group Policy, DNS, DHCP, IIS • Microsoft Azure, Entra ID, Microsoft 365, hybrid infrastructure, Azure Virtual Desktop • Microsoft SQL Server administration, performance troubleshooting, migrations, backup/recovery, Always On and HA/DR • VMware vSphere, ESXi, vCenter, vSAN, Hyper-V and high-availability virtualization environments • Veeam, Acronis, MSP360, Datto and enterprise backup/disaster recovery • SCCM/MECM, patching, software deployment and complex endpoint-management issues • Storage, SAN/NAS, networking, VPNs, firewalls and infrastructure connectivity • Infrastructure migrations, upgrades, disaster recovery planning and technical documentation I regularly serve as a senior escalation resource for issues spanning servers, databases, virtualization, storage, networking, cloud services, security, and backup systems. I am comfortable taking ownership of difficult incidents from initial investigation through remediation, validation, root-cause analysis, and documentation. I also work directly with MSPs and enterprise clients that need additional senior engineering capacity for L3/L4 escalations, project work, migrations, infrastructure assessments, or temporary technical support. I am based in the United States and available for remote hourly, project-based, 1099, and C2C engagements. If you are dealing with a complex infrastructure issue, planning a migration or upgrade, or need an experienced senior engineer who can work independently across multiple technologies, I would be happy to discuss your environment and the best approach. I have extensive experience working across multiple technology layers, including: • Windows Server, Active Directory, Group Policy, DNS, DHCP, IIS • Microsoft Azure, Entra ID, Microsoft 365, hybrid infrastructure, Azure Virtual Desktop • Microsoft SQL Server administration, performance troubleshooting, migrations, backup/recovery, Always On and HA/DR • VMware vSphere, ESXi, vCenter, vSAN, Hyper-V and high-availability virtualization environments • Veeam, Acronis, MSP360, Datto and enterprise backup/disaster recovery • SCCM/MECM, patching, software deployment and complex endpoint-management issues • Storage, SAN/NAS, networking, VPNs, firewalls and infrastructure connectivity • Infrastructure migrations, upgrades, disaster recovery planning and technical documentation I regularly work as a senior escalation resource for issues that span servers, databases, virtualization, storage, networking, cloud services, security, and backup systems. I am comfortable taking ownership of difficult incidents from initial investigation through remediation, validation, root-cause analysis, and documentation. I also work directly with MSPs and enterprise clients that need additional senior engineering capacity for L3/L4 escalations, project work, migrations, infrastructure assessments, or temporary technical support. I am based in the United States and available for remote hourly, project-based, 1099, and C2C engagements. If you are dealing with a complex infrastructure issue, planning a migration or upgrade, or need an experienced senior engineer who can work independently across multiple technologies, I would be happy to discuss your environment and the best approach.