David G.

Need an experienced Systems Administrator to troubleshoot, secure, upgrade, or optimize your Windows, VMware, Microsoft 365, or Azure environment? I am a Senior Systems Administrator with 10+ years of hands-on experience supporting enterprise IT infrastructure, Windows Server environments, VMware virtualization, Microsoft Azure, Active Directory, Microsoft 365, hybrid Exchange, SCCM, VDI, backup systems, and infrastructure automation. I have supported complex production environments for transportation, insurance, technology, and electronic distribution organizations. My focus is to provide secure, stable, well-documented, and reliable infrastructure solutions while minimizing downtime and operational risk. My core services include: ✔ Windows Server installation, administration, troubleshooting, patching, and upgrades ✔ Active Directory, Group Policy, DNS, DHCP, Domain Controllers, and user authentication ✔ Microsoft 365 and hybrid Exchange administration ✔ Azure Active Directory, AD Connect, SSO, MFA, and Conditional Access ✔ VMware vSphere, ESXi, vCenter, HA, DRS, FT, templates, snapshots, and clusters ✔ VMware Horizon View and Virtual Desktop Infrastructure administration ✔ PowerShell and PowerCLI automation ✔ SCCM application packaging, deployment, administration, and troubleshooting ✔ Veeam and Commvault backup, restoration, and replication ✔ Windows and Linux virtual machine provisioning ✔ Server performance, capacity, availability, and infrastructure monitoring ✔ ServiceNow and JIRA incident, request, and change management ✔ SCOM, Splunk, antivirus, endpoint protection, and security support ✔ Infrastructure upgrades, migrations, documentation, and technical support I have practical experience upgrading VMware environments, configuring enterprise MFA, supporting hybrid Microsoft environments, managing Horizon VDI deployments, automating repetitive administrative tasks, performing Active Directory migrations, and resolving critical infrastructure incidents. My certifications include: ✓ CompTIA Security+ ✓ CompTIA Network+ ✓ CompTIA CySA+ ✓ ITIL 4 ✓ AWS Cloud Practitioner training and previous certification Whether you need help with a one-time infrastructure issue, server migration, VMware upgrade, Microsoft 365 configuration, Active Directory troubleshooting, PowerShell automation, or ongoing system administration, I will provide a structured and dependable solution. Send me a message with details about your current environment and the issue you need resolved.