Senior Systems Administrator

Position: Senior Systems Administrator
Employment Type: Full-Time

We are looking for an experienced Senior Systems Administrator to manage, secure, and optimize the core IT infrastructure-including on-prem and virtual server environments, storage systems, and enterprise tools. The ideal candidate will have deep hands-on expertise in VMware vSphere, Active Directory, Exchange, endpoint protection, and disaster recovery.

Core Responsibilities:

• Design, deploy, and maintain VMware vSphere environments (vCenter, ESXi, Update Manager).


• Administer Active Directory, Exchange Server, and Group Policy across a multi-site environment.


• Implement and manage SolarWinds Orion for performance monitoring and alerting.


• Maintain and troubleshoot SAN, UPS, and server hardware.


• Oversee patch management, server OS upgrades, and endpoint security (e.g., Symantec).


• Perform regular disaster recovery testing and maintain recovery documentation.


• Deploy and maintain role-based access controls for Help Desk and departmental users.


• Coordinate with vendors for hardware/software installs, upgrades, and licensing.


• Lead server/storage capacity planning and performance tuning initiatives.


• Maintain comprehensive system documentation and ensure audit-readiness.

Required Experience & Skills:

• 5-7+ years of experience in enterprise systems administration.


• Expertise with VMware vSphere (vCenter, ESXi), Windows Server, and AD environments.


• Proven ability to manage enterprise storage solutions and virtualization infrastructure.


• Experience with Exchange Server, endpoint protection platforms, and system backups.


• Strong scripting or automation knowledge (e.g., PowerShell) preferred.


• Familiarity with IT security best practices and compliance in a regulated environment.

Preferred Certifications:

• VMware VCP, Microsoft Certified: Windows Server, or similar.


• ITIL, CompTIA Security+, or CISSP (a plus).

All qualified applicants will receive consideration for employment without regard to race, color, national origin, age, ancestry, religion, sex, sexual orientation, gender identity, gender expression, marital status, disability, medical condition, genetic information, pregnancy, or military or veteran status. We consider all qualified applicants, including those with criminal histories, in a manner consistent with state and local laws, including the California Fair Chance Act, City of Los Angeles' Fair Chance Initiative for Hiring Ordinance, and Los Angeles County Fair Chance Ordinance. For unincorporated Los Angeles county, to the extent our customers require a background check for certain positions, the Company faces a significant risk to its business operations and business reputation unless a review of criminal history is conducted for those specific job positions.