David Lenz

Scottsdale, AZ

• Administer and maintain Microsoft 365 infrastructure including Azure AD/Entra ID, Exchange Online, SharePoint Online, and Teams across enterprise multi-site environment.
• Manage Intune device provisioning, endpoint configuration, and mobile device management for Windows and macOS fleet, ensuring compliance and security standards.
• Configure and maintain Cisco Meraki networking infrastructure including VLAN segmentation, IP provisioning, device assignment, and network policy enforcement.
• Deploy and manage Ubiquiti UniFi networks including device adoption, port configuration, network optimization, and troubleshooting across multiple locations.
• Diagnose and resolve printer hardware and firmware issues for HP, Epson, Brother, and Zebra equipment, including driver troubleshooting, queue management, and network printing configuration.
• Provide Tier 2-3 technical support across infrastructure, networking, and endpoint management while maintaining comprehensive documentation and excellent user communication.
• Diagnose and resolve complex infrastructure issues spanning networking, hardware, identity management, and software layers, reducing downtime and improving system reliability.
• Clear 50–60 support tickets per week.
• Help troubleshoot issues across 500+ golf courses.

Phoenix, AZ

• Provide Tier 2 technical support for Azure Virtual Desktop (AVD) and VMware Horizon/Omnissa/Citrix VDI sessions, ensuring secure connectivity and consistent performance for end users.
• Built and configured virtual environments from the ground up, starting with bare switches and building out network infrastructure with an emphasis on resilience and scalability.
• Collaborated with R&D and QA teams to test and validate thin client hardware and VDI performance across a range of enterprise configurations.
• Supported infrastructure security by maintaining secure connections through DMZ configurations, protecting sensitive virtual environments from unauthorized access.
• Diagnosed and resolved infrastructure issues across networking, hardware, and software layers, reducing downtime and improving overall system reliability.
• Partnered with cross-functional teams including engineering and QA to validate new device releases, ensuring devices met functionality, performance, and security standards before deployment.
• Managed support workflows through Zendesk and RingCentral VoIP, maintaining organized ticket queues and delivering professional communication with mid-to-senior level technical personnel.

Peoria, AZ

• Provided Tier 1–2 support for Windows and macOS systems, resolving hardware and software issues across a large, multi-site environment.
• Administered Active Directory accounts, including creation, group membership updates, and password management.
• Diagnosed network connectivity issues using TCP/IP, DHCP, DNS, ping, and traceroute, resolving segmentation and port configuration problems on Cisco switches.
• Configured and maintained printers including DHCP reservations, print queues, and print server settings.
• Performed OS imaging, patch management, and software deployments across Windows and macOS fleets.
• Delivered responsive remote and on-site support while keeping clear documentation and maintaining strong end-user communication.

Phoenix, AZ

• Onboarded and trained new hires, improving team accuracy and operational throughput in a high-volume logistics environment.
• Conducted weekly compliance audits to ensure workflow accuracy and data integrity across daily operations.
• Worked with leadership to identify inefficiencies and contribute to process improvements and updated documentation.
• Operated and troubleshot warehouse printer systems, applying hardware troubleshooting skills in a production setting.

This site · Read what I learned building it → · Source code: frontend · backend

• Built a serverless visitor counter: a Python Azure Function (Flex Consumption) writing to Cosmos DB through a managed identity, with database keys disabled.
• Defined all infrastructure in Terraform with remote state, deployed through GitHub Actions using OIDC, with no stored secrets.
• Added pytest unit tests, pull-request plan reviews, and a manual approval gate before every production change.
• Limited the pipeline identity to one resource group, with an ABAC condition that stops it from escalating its own permissions.