Dan H. Email & Phone Number

United States

St. Louis, Mo, Us

Managed and maintained vCloud multi-tenant cloud infrastructure, encompassing vSphere, vCenter, vSan, and vCloud Director in Managed Services Provider environment.Collaborated with cross-functional teams to define and implement best practices for virtualization architecture, deployment, and management, fostering efficiency and innovation.Monitored system performance, capacity, and availability, proactively identifying and addressing potential issues to minimize downtime and optimize resource utilization.

Lake Mary, Florida, Us

Spearheaded diagnosis and resolution of issues within a highly virtualized environment comprising 6800+ virtual machines across 18 vCenter datacenters and vSAN clusters.Solely orchestrated the creation and implementation of the protocols for updating Dell vSAN Ready Node firmware and upgrading vSphere ESXi, vCenter, and vSAN from version 6.7 to 7.0.3 across all 18 production environments.Developed Ansible playbooks to automate the deployment of virtual machines and streamline vCenter configuration across 18 satellite-connected data centers, ensuring consistency and efficiency in operations.

Rockledge, Florida, Us

Led diagnosis and resolution of issues while defining and implementing new processes and procedures to optimize uptime and availability in a highly virtualized environment encompassing 2000+ virtual machines, 5 vCenter datacenters, and multiple offsite vSAN deployments.Developed customized PowerShell/PowerCLI scripts to extract performance metrics and informational data from diverse virtual environments, enhancing operational efficiency.Mentored a team of Systems Administrators on various virtualization topics, including the upgrade and administration of vSphere, vCenter, and PowerCLI automation, fostering skill development and knowledge sharing.Designed and executed virtualization procedures for Health First's migration from vSphere 6.7 to vSphere 7.0, ensuring a seamless upgrade and continual patching process.Managed Cisco UCS Infrastructure, ensuring optimal uptime by maintaining appropriate firmware levels and service profiles compatible with the ESXi versions installed on each blade.

Burlington, Ma, Us

Utilized and administered event management monitoring software such as Nagios, SCOM, and SQLDM to effectively track and resolve incidents, ensuring adherence to system uptime requirements.Managed and administered three VMware ESXi vCenter Datacenters, overseeing nearly 1400 virtual servers running CentOS, Red Hat Linux, and Windows within a multi-domain environment.Provided first-line system administrator support for over 10,000 servers globally hosted by a Fortune 500 SaaS provider serving the healthcare industry, maintaining system integrity and application efficiency.

Rockledge, Fl, Us

Managed and administered two locally hosted VMware vCenter Datacenters ensuring optimal performance and uptime.Administered a diverse array of over 50 physical servers running operating systems including AS/400, AIX, Red Hat Enterprise Linux, CentOS, and Windows Server Enterprise (2003, 2008, and 2012), maintaining their stability and functionality.Executed various system administration tasks such as configuring DHCP scopes, creating/modifying DNS entries, implementing group policies, and conducting hardware and operating system maintenance to optimize system performance.

Bachelor Of Applied Science (Basc), Information Technology

Associate Of Science - As, Business Administration And Management, General

Associate Of Science (A.S.), Information Technology

Associate Of Arts (A.A.), General Studies