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Windows System Admin Jobs in California (NOW HIRING)

IQUASAR LLC

System Admin

San Diego, CA · On-site

$25 - $35/hr

Well-versed in Windows, Linux and MacOS. * 6+ years of experience with an Associate's degree and ... systems * Help to administer and support Windows Active Directory, Azure Active Directory, and ...

iQuasar LLC

System Admin

San Diego, CA · On-site

$25 - $35/hr

Well-versed in Windows, Linux and MacOS. * 6+ years of experience with an Associate's degree and ... systems * Help to administer and support Windows Active Directory, Azure Active Directory, and ...

CB

System Admin

San Diego, CA · On-site

Well-versed in Windows, Linux and MacOS. * 6+ years of experience with an Associate's degree and ... systems * Help to administer and support Windows Active Directory, Azure Active Directory, and ...

Spark Tek Inc

System Admin

Milpitas, CA · On-site

Spark Tek Inc is seeking a System Admin to support their IT operations. The role involves managing Windows operating systems, troubleshooting issues, and ensuring network connectivity.

EROS Technologies Inc

System Admin

San Jose, CA · On-site

Job Title: System Admin Location: San Jose, CA Joining Mode: Contract to Hire - KEY ... SAN and NAS storage, ESX VMware, Microsoft Windows Server, Unix/Linux servers, Cloud Platform ...

US Tech Solutions

System Admin

Hayward, CA

Description Building new systems and administering systems Exchange 2012, Citrix Xendesktop on VMware Hyper-V and ESX 99% windows server environment - version 2008 + up Pure storage Traditional NAS ...

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Showing results 21-40

All JobsWindows System Admin JobsWindows System Admin Jobs in California

Windows System Admin information

See California salary details

$53.3K

$94.7K

$128.8K

How much do windows system admin jobs pay per year?

As of Sep 4, 2026, the average yearly pay for windows system admin in California is $94,700.00, according to ZipRecruiter salary data. Most workers in this role earn between $78,000.00 and $109,100.00 per year, depending on experience, location, and employer.

What is a Windows system admin?

Windows System Admins, or Windows System Administrators, are IT professionals responsible for managing, configuring, and maintaining Microsoft Windows-based servers and systems within an organization. Their duties include installing software, managing user accounts, ensuring system security, troubleshooting issues, and performing regular backups. They play a critical role in ensuring the smooth operation, reliability, and security of an organization’s IT infrastructure.

What are the key skills and qualifications needed to thrive as a Windows system admin?

To thrive as a Windows System Admin, you need a solid understanding of Windows server environments, Active Directory, networking concepts, and typically a relevant degree or certifications such as Microsoft Certified: Windows Server Fundamentals. Familiarity with tools like PowerShell, Hyper-V, System Center, and backup/restore systems is commonly required. Strong problem-solving abilities, attention to detail, and effective communication skills help in managing incidents, collaborating with teams, and supporting end users. These competencies are crucial for ensuring system reliability, security, and efficient IT operations in business environments.

What are some common challenges Windows system admins face when managing large enterprise environments?

Windows System Administrators in large enterprise settings often encounter challenges such as maintaining consistent configurations across multiple servers, ensuring security compliance, and managing software updates without disrupting business operations. They also need to troubleshoot complex issues that may arise due to the interaction of various applications and network components. Effective communication and collaboration with other IT teams, such as network and security specialists, are essential to address these challenges efficiently and maintain a stable IT infrastructure.

What is the difference between Windows System Admin vs Network Administrator?

AspectWindows System AdminNetwork Administrator
CertificationsCompTIA Server+, Microsoft Certified: Windows Server FundamentalsCompTIA Network+, Cisco CCNA
Work EnvironmentManaging Windows servers, Active Directory, and system securityConfiguring and maintaining network infrastructure, routers, switches
Primary FocusServer and OS managementNetwork connectivity and infrastructure

While both roles involve IT infrastructure, Windows System Admins focus on managing Windows servers and related systems, whereas Network Administrators handle network hardware and connectivity. Both roles often collaborate but have distinct responsibilities within an organization's IT environment.

What are popular job titles related to Windows System Admin jobs in California?

For Windows System Admin jobs in California, the most frequently searched job titles are:

What job categories do people searching Windows System Admin jobs in California look for?

The top searched job categories for Windows System Admin jobs in California are:

What cities in California are hiring for Windows System Admin jobs?

Cities in California with the most Windows System Admin job openings:

Windows System Admin jobs near you
Infographic showing various Windows System Admin job openings in California as of August 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution, with an average salary of $94,700 per year, or $45.5 per hour.

System Admin

IQUASAR LLC

San Diego, CA • On-site

$25 - $35/hr

Part-time

Medical, Dental, Vision, Retirement

Re-posted 23 days ago

Job description

iQuasar is seeking to fill an Systems Administrator in San Diego, CA. At iQuasar, we strive to provide the next generation of cutting-edge technologies. Our growth means exciting career opportunities for talented professionals in engineering, software development, and other key areas. We offer competitive compensation and benefits, including Health, Vision, and Dental Insurance, a matching 401 (k) plan, and other benefits given below, excellent training, and a vibrant working environment. Our employees are exceptional, giving us a competitive advantage by innovating solutions with a strong sense of mission and integrity.
One of our clients in San Diego, CA, needs a System Admin for a full-time position.
Position: Linux System Admin
Location: San Diego, CA
Clearance Level: Secret 
Job Type: Part Time (up to $25 hours/week)

JOB DESCRIPTION:
iQuasar is seeking an experienced Information Systems Administrator (SysAdmin) to assist in the design, implementation, maintenance, and support of the corporate network infrastructure in a mission-critical environment. The successful candidate will have a strong foundation in secure network architecture, system integration, Windows/MacOS/Linux administration, and familiarity with Cybersecurity Maturity Model Certification (CMMC) cybersecurity frameworks.
REQUIREMENTS:
  • Well-versed in Windows, Linux and MacOS.
  • 6+ years of experience with an Associate’s degree and DoDInst. 8570 IAT Level 2 in lieu of a bachelor’s degree; or 8+ years of experience and DoDInst. 8570 IAM Level 2 in lieu of a bachelor’s degree; or 4+ years of experience with a master’s degree in information systems, Computer Science or similar computing focused engineering.
  • 3-4 years of experience managing secure network environments and infrastructure
  • Deep understanding of networking protocols (e.g., IPSEC, HSRP, BGP, OSPF, 802.11, QoS, SSH), VPNs and Firewalls
  • Proficient in both cloud and on-premises environments and establishing a strong software development focused environment at TRABUS
  • Solid understanding of OSI or TCP/IP models and software-defined networking with Access Control Policies.
  • Proficiency in managing Windows, MacOS and LINUX-based systems
  • Experience supporting federal systems and complying with federal cybersecurity standard
  • Familiarity with CMMC Level 2+ controls and implementation practices
  • Experience with network monitoring and diagnostic tools
RESPONSIBILITIES:
  • Help and assists in configuring and installing various network devices and services (e.g., routers, switches, firewalls, load balancers, VPN, QoS)
  • Assist in performing network maintenance and system upgrades including service packs, patches, hot fixes, and security configurations
  • Assist in the monitoring of network performance and health, ensuring continuous system uptime and reliability
  • Track overall system resource utilization, trending, and capacity planning using logging and analytical tools such as Intune and Grafana.
  • Provide Level 2/3 support and troubleshooting for network issues
  • Perform routine updates and configuration cycles for Windows 11/Server 2016/2019, Ubuntu and other LINUX distributions, as well as MacOS systems
  • Help to administer and support Windows Active Directory, Azure Active Directory, and Office 365 environments
  • Configure and manage VPNs (specifically WireGuard VPN) and establish isolated network and safe computing environments
  • Ensure compliance with configuration and change management processes
  • Help to implement and support CMMC compliance practices, including documentation, secure access control, and logging of system data and policies.
  • Work collaboratively with security personnel and vendors for problem resolution and implementation of cybersecurity best practices
  • Work closely with development teams and platform engineers in deploying robust, and CMMC compliant, network environments that facilitates efficient software development work
DESIRED:
  • 8+ years of experience handling secure networks and infrastructure
  • Security+ or equivalent DoDInst. 8570 IAT Level II certification
  • Advanced LINUX/Unix-based system administration and security hardening experience
  • Clearance: Active Top Secret or Top Secret Eligible (SCI eligibility preferred).
EDUCATION: 
  • Bachelor’s degree in electrical engineering, Computer Engineering, Computer Science, Information Technology, or a related quantitative fie
If you are interested in this position, please send me a copy of your latest resume at Zain.Wani@iquasar.com/ with the information requested below: Also, please let me know what time/number is best to call to discuss this great opportunity. In case you are not interested in this position, or this is not a right fit for you, please feel free to share this opportunity with your friends/networks or anyone you know who may be interested in this position. 
Thank you!
 
•    Availability to start a new job
•    Best Rates
•    Contact #
 
Please don’t hesitate to contact me for any questions you may have. All employment is decided on the basis of qualifications, merit, and business need.
Regards,
Zain Wani
Senior Recruitment Professional
iQuasar, LLC
Cleared Recruitment | Proposal Development | Technology
Zain.Wani@iquasar.com/
Direct: (703) - 349 - 5832
Main: (703) - 962-6001, Ext. 538
www.iQuasar.com
An Equal Opportunity Employer
iQuasar is proud to be an Equal Employment Opportunity Employer. We do not discriminate based on race, religion, color, national origin, political affiliation, sex, sexual orientation, gender identity, age, marital/parental /veteran status, disability, genetic information, membership in an employee organization, retaliation, military service, other non-merit factors, or any other applicable characteristics protected by law.

Flexible work from home options available.