Senior IT System Administrator

This position requires infrequent visits to our client's office in Irvine, CA (95% remote).

We are seeking a highly skilled Senior IT Systems Administrator. The ideal candidate will have a strong background in managing and supporting enterprise systems, including Windows Server environments, VMware, AWS, Entra ID, Microsoft 365, Intune, and Citrix. Additionally, experience with single sign-on (SSO) solutions, preferably OKTA, is highly desirable. The role requires expertise in system administration, maintenance, upgrades, troubleshooting, and issue resolution to ensure seamless IT operations.

Key Responsibilities:

System Administration and Maintenance:

• Administer, configure, and maintain Windows Server environments (all versions).
• Manage and optimize virtualized environments using VMware.
• Oversee hybrid Active Directory and Entra ID cloud environments through advanced command-line scripting
• Develop PowerShell scripts and implement Infrastructure as Code (IaC) to enhance the security and scalability of hybrid network environments

Enterprise Tool Support:

• Manage Microsoft 365 services, ensuring high availability and performance.
• Implement, configure, and maintain single sign-on solutions, preferably with OKTA.
• Administer and troubleshoot Citrix environments for application delivery and desktop virtualization.
• Manage Microsoft Intune and Autopilot for Azure automated Zero Touch Deployment for cloud infrastructure and asset management

Upgrades and Patch Management:

• Plan and execute system upgrades and patches to maintain security and performance.
• Conduct proactive monitoring and capacity planning for IT infrastructure.

Troubleshooting and Issue Resolution:

• Diagnose and resolve complex system and network issues promptly.
• Collaborate with internal teams to resolve escalated IT support requests.
• Document procedures, configurations, and incident resolutions in a knowledge base.

Qualifications and Skills:

Technical Expertise:

• Proficient in managing Windows Server (all versions).
• Strong experience with VMware virtualization technologies.
• Hands-on experience with AWS and Azure Active Directory.
• Knowledge of Microsoft 365 administration and services.
• Familiarity with single sign-on (SSO) solutions, preferably OKTA.
• Proficiency with Citrix environments for application and desktop delivery.

Experience:

• 3-5 years of hands-on experience in IT systems administration.
• Demonstrated experience with enterprise-level IT tools and environments.