David M.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Analytical, solutions-focused professional with over 20 years of hands-on technical and managerial experience in computing, networking, and telecommunications. Diverse background encompasses IT operations/support, IT professional services consulting, software development/installation/support, and systems integration. Team player with a track record of contributing to company and client success, with strong project management, writing, and client relations skills. Dedicated to maintaining up-to-date knowledge of rapidly changing technologies. Adept in analyzing, troubleshooting, and resolving complex hardware and software issues. Specialties -- Current focus is dual: *Virtualization: VMware vCenter and ESXi - have built and managed multiple 6.5, 6.7, 7.0, and 8.0 vCenters with as many as 250 Cisco UCS B and C-Series hosts. Manage all aspects of hardware provisioning and configuration as well as installing and configuring vCenter, ESXi, FC and NFS datastores, and other components. Manage day-to-day operations, capacity and lifecycle planning, and troubleshooting various issues. Have performed cross-cluster and cross-vCenter VM migrations. Expert level with Cisco UCS and HyperFlex. Familiar with Dell PowerEdge and VxRail systems. I have been working with VMware off and on since ESXi v1.1, and on a daily basis for over 7 years, including automation scripting using PowerShell, VMware PowerCLI, and Cisco Power Tools. *Networked Storage: SAN/NAS design and mgmt. - over 15 years experience with SAN design, storage provisioning and capacity planning; data protection, replication, backup, and disaster recovery. Strengths with EMC, NetApp, IBM, Cisco, Brocade, Commvault. Very strong experience with Dell EMC Clariion, VNX, VMAX, XtremIO and Unity arrays, as well as NetApp C-DOT on 2-6 node clusters, Dell Isilon, and Pure Storage. Have had responsibility for over 10 PB of data storage. Some experience with Zerto Replication for DR. **** Currently hold Dell/EMC Proven Professional Certified Associate - DCA Information Storage and Management Certification*** *Some experience with Microsoft Azure Cloud Compute and Storage. *Operating systems worked with over the years: MS-DOS, all early Windows versions, Windows NT 3.5-4.0, Windows 2000-2022; VMware ESXi 1-8 with some exposure to VCF 9; Linux, MacOS Lion through Catalina, UNIX SysV; Solaris, AIX, IRIX, Photon. *Past focus on Networking: planning, design, and implementation of LAN/WAN and wireless networks. Networking protocols and hardware familiar with: TCP/IP, SNMP, DHCP, Layer 2 switching, LACP, 802.11 Wireless, Fibre Channel Protocol, VSAN, FCoE, FCIP, iFCP, iSCSI, NFS, CIFS. *** Formerly held Cisco Certified Networking Associate (CCNA) Certification (expired) *** *** Formerly held Citrix MetaFrame 1.8 Certification (expired) *** *** Formerly held Certified Wireless Network Administrator (CWNA) Certification (expired) *** Currently pursuing VMware VCP Certification. Training completed, just need to take exams.