Onsite in Irvine, CA 10+ years of experience is required 6 month contract plus extensions Required Experience: + 10+ years experience in large Enterprise environments with thousands of users and hundreds of servers and critical Enterprise Applications. + Strong understanding of overall IT Infrastructure concepts including data center, compute, storage, networking, security, identity, DR, HA, etc. + Extensive administration of on-premises Active Directory. + Expert level knowledge of AD concepts and objects including Forest, Site, Domain, Trust, OU, GPO. + Powershell experience, creating and modifying custom scripts to report and perform bulk actions on AD objects, systems, and integrated technologies. + Expert level technical knowledge and administration experience of Windows Server 2008 - 2019. + Extensive hands-on experience with VMware, vSphere, and vCenter design, administration, capacity planning, and troubleshooting. + Working knowledge of Windows Server authentication methods and integration of 3rd party applications (ADFS, LDAP, SAML, Kerberos) + Strong capabilities with MS Office/365 tools including Outlook, Excel, Word, Powerpoint, Visio, Teams, etc. + O365 integration with on-premise AD. Role and Responsibilities: + Manage and maintain Active Directory leveraging scripts and automation wherever applicable. + Administration and management of Windows Servers through full life-cycle. + Administration and capacity planning of VMware multi-cluster environment. + Supporting and adhering to change management process. + Perform scripting of administration tasks and reporting using PowerShell. + Develop scripts for automating processes within the environment. + Collaboration with network, InfoSec, storage, data center, vendors, and other stakeholders in support of the running environment and project initiatives. + Participation in triage and troubleshooting for all responsible technologies. + Develop and maintain technical documentation describing the environment.