Systems Administrator
Sellers & Associates, LLC
Who We Are Sellers & Associates, LLC (S&A) is a Veteran Owned Small Business (VOSB) that provides effective and affordable Programmatic and Engineering Support Services and Solutions to our Government and Commercial Clients. We work directly with our clients taking the time to understand their culture and requirements designing a custom solution tailored to meet their unique needs at an affordable price without sacrificing quality. Our specialties include Program/Engineering Management, Training/Training Technology, Technology/Product Development Strategy and Analysis, Project Management (Cost, Schedule, Scope & Quality), and Strategic Planning applied within our clients' unique domains and context. We have Medical, Dental, Vision, 401k with company match. Long/Short Term Disability and Life Insurance. 25 days of PTO per year. Employees may choose to work or take PTO on Federal Holidays (pending contract requirements). We also offer a TRICARE Supplement Insurance Package as well as Tuition Reimbursement up to $5,250 per year for areas of study relevant to employee position responsibilities and opportunities for professional growth. Position Description Location Security Clearance Requirements Must be Able to Obtain a Clearance Job Description We are seeking a Systems Administrator to join our team in San Diego, CA (on-site). Responsibilities: Implement and maintain CMMC & NIST 800-171 compliance. Provide system administration for infrastructure while establishing and maintaining security as it relates to users. Lead and complete a diverse set of IT projects (software deployments, system migrations, updates, networking configurations, facility build outs, audio/video install). Exhibit a track record of solid IT systems knowledge with hardware, software, network printers, server, VM, and other network technology. Participate in onboarding of new hires through electronic presentation; ensure that new hires have functioning computers and are aware of how to use them according to company policies and guidelines. Install, upgrade, configure, test, maintain and support operating system software and associated applications in a production environment. Create & maintain all configuration documentation. Perform daily system monitoring, verifying the integrity and availability of all hardware, server resources, systems, and key processes, reviewing system and application logs, and verifying completion of scheduled jobs such as backups. Local/Remote Network Management and configuration (Cisco switches, Ubiquiti routers, Aruba IAP’s, Blade servers/VM’s). Design, implement and maintain SIEM, security baseline configuration for O365 GCC High, Intune & Azure Active Directory Group Policy Settings. Conference room audio/video install & maintenance. Analyze, troubleshoot, and resolve issues with IT infrastructure including user systems, servers, audio/video, and storage and network connectivity. Inventory Management with the use of asset tagging and auditing. Review system and security logs to locate and investigate anomalies. Apply security patches to applications and operating systems. Job Requirements Basic Qualifications: Ability to obtain a Secret security clearance CompTIA Security+ Certification Ability to run new Cat6 wiring in Ceilings, walls, and floors (interior and exterior) while applying proper termination techniques. Knowledge and ability to mount flat screen TV’s to various wall surfaces. Strong work ethic and excellent organizational skills Possess a high degree of originality, creativity, initiative requiring minimal supervision Experience in managing, configuring, and troubleshooting Windows Server Operating Systems, Active Directory, Azure, Intune, and Networking to include Cisco CLI usage Strong knowledge of networking and security concepts including routing, switching, VLANs, firewalls, and SNMP monitoring Strong technical, analytical, and trouble-shooting skills with ability to communicate technical information to non-technical end-users Facility rough-in experience CMMC/NIST 800-171 experience Database, cloud application, software development, or website development experience is a plus. PC Watercooling build experience a plus. Travel % 0 - 10% Sellers and Associates, LLC is an E-Verify company and an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability. #J-18808-Ljbffr Sellers & Associates, LLC
$98.11k - $147.16k
...solutions. From software-defined radios to cutting-edge cryptographic systems and avionics, everything we build powers the next era of New... ...the infinite, together. A DAY IN THE LIFE As an IT Systems Administrator III, you’ll lead advanced system administration, security...SuggestedRemote workWork visaFlexible hours$90k - $150k
...Overview Innovative Defense Technologies (IDT), a leading defense technology company, is seeking a Systems Administrator to be part of our Security team and based out of our San Diego, CA location. Department: Operations Employment Type: Full Time Location: San Diego,...SuggestedFull timeImmediate start$32 - $41 per hour
...term career with a company that truly invests in your future. Life and AD&D Insurance Responsibilities A Day in the Life of a Systems Administrator As Systems Administrator for Liberty Military Housing, you will be responsible for the overall IT operations of a portfolio...SuggestedHourly payTemporary workWork at officeRemote work$67.6k - $122.2k
...within our CISO and Digital Modernization Sector, is seeking a System Administrato r to support various classified environments. The... ..., remote system management, NTFS permissions, and common administration tools. Basic knowledge of Linux‑based distributions and willingness...SuggestedFor subcontractorLocal areaImmediate startRemote work- ...Position Description Location Security Clearance Requirements Must be Able to Obtain a Clearance Job Description We are seeking a Systems Administrator to join our team in San Diego, CA (on-site). Responsibilities: Implement and maintain CMMC & NIST 800-171 compliance....SuggestedContract workTemporary workLocal areaRemote work
$80k - $120k
...Description SAIC is looking for a System Administrator to join the Fleet Support Team in support of the Comprehensive Automated Maintenance Environment – Optimized (CAMEO) Software for the V-22 Community across the Air Force, Navy, and Marine Corps out of Miramar, California...Work at office$107.74k - $120.75k
...Job Description Transform technology into opportunity as a Systems Administrator with GDIT. A career in enterprise IT means connecting and enhancing the systems that matter most. At GDIT you’ll be at the forefront of innovation and play a meaningful part in improving how...Temporary workLocal area- ...phase, GlobalXperts technical staff has been successfully utilized by our customers for any or all phases. Job Description The System Administrator (SA) is responsible for server installation, maintenance, back up and security, along with performance tuning and capacity...Remote work
$76.7k - $129.5k
...Position We are searching for an experienced, organized, positive, and self‑motivated Infrastructure Systems Administrator to join our DevSecOps Department within the Joint Mission Integration and Experimentation (JMIE) Division at the Applied Research Laboratory (ARL)...Full timeWork experience placementWork from homeFlexible hours- ...Overview We are seeking a mission-focused Systems Administrator to support Navy enterprise IT environments. This role is responsible for maintaining servers, networks, and cybersecurity compliance across classified and unclassified systems. You'll work closely with senior...
$70k - $120k
...Saalex Corporation is seeking multiple System Administrator II inTidewater, VA and San Diego, CA. Saalex Corp., is an Engineering and Information Technology Services company with a focus on Test Range Operations and Management, Engineering and Logistics Services, Data...Contract workTemporary workLocal areaFlexible hours$100k
...deployments. Lead technical planning, testing, and execution of complex system upgrades, including operating systems, infrastructure... ...Provide senior-level technical support and guidance to system administrators, serving as an escalation point for complex patching, upgrade,...Minimum wageContract workTemporary workWork experience placement$120k - $155.4k
...Overview Resource Management Concepts, Inc. (RMC) is looking for a talented Systems Administrator III to support the Naval Information Warfare Center (NIWC) Pacific Service Centers in Point Loma, CA. This role is critical in ensuring seamless operations within the Data...Contract work$90k - $125k
...Description Position Title: Systems Administrator Location: San Diego, CA Status: Full-time / On-site Required Clearance: Secret Required Certification(s): IAT Level II (Security+, CySA+, etc.) About Us: RTL Networks, Inc. is a rapidly growing company primarily focused...Full timeWork experience placementLocal areaRemote work$60k - $105k
...Position Overview Saalex Corporation is seeking multiple System Administrator I positions in Tidewater, VA and San Diego, CA. Saalex Corp. is an Engineering and Information Technology Services company with a focus on Test Range Operations and Management, Engineering and...Contract workTemporary workLocal areaFlexible hours- ...Overview Position Summary The position of Systems Administrator will be responsible for the performance, availability, and reliability of SDCCU’s information technology infrastructure serving both SDCCU’s employees and customers. Maintain high quality service and production...Full time
- ...A client in San Diego is looking for a Systems Administrator/Network Engineer to manage their existing server and network environment. We are looking for someone with experience managing/maintaining/upgrading multiple types of servers, Active Directory, VPNs, and networking...
- Summary The Systems Administrator II/VDI Engineer supports the design, configuration, and sustainment of the Virtual Desktop Infrastructure (VDI) environment used across PMW 790's STACC enterprise. This role ensures secure, reliable, and efficient desktop virtualization...Remote work
- Information Management Resources, Inc. is seeking a Systems Administrator II/VDI Engineer in San Diego, CA. The role focuses on maintaining and administering Virtual Desktop Infrastructure (VDI) environments, ensuring operational efficiency and cybersecurity compliance....
$110k - $130k
...offer relocation assistance. Competitive Salary Range: $110,000-$130,000 per year DOE The Role We are looking for a Senior Systems Administrator who will own the design, implementation, and reliability of an organization's core server and cloud infrastructure. The role...Work experience placementWork at officeImmediate startRelocation packageMonday to Friday$77k - $130k
...requirements, our recruitment team will contact you as soon as possible. Open Jobs Dec 12 2025 ID Job Title Job Description 77113 System Administrator Yakshna Solutions, Inc ., (YSI) is a CMMI Level 3 assessed, ISO 9001, 20000:1, 27001 certified, woman-owned small business...Full timeTemporary workLocal areaImmediate startRemote work- Boarhog will hire a Systems Administrator in San Diego CA to support the Surface Combat Systems Training Command (SCSTC) which requires Network Administrative Support, including Information Management, Computer and Local Area Network (LAN) Administration, Cyber Security...Full timeContract workFor contractorsWork at officeLocal areaImmediate startRemote workWorldwideRotating shift
$38.25 - $49.25 per hour
...Education, Experience, Skills) Bachelor’s Degree in Business Administration or related field or equivalent education or work experience.... ...and manages consistent execution of changes and enhancements to system logic, rules, and behavior. Participate in AML/BSA compliance...Hourly payFull timeWork experience placementMonday to FridayNight shiftWeekend work$125k - $135k
*Active Secret Clearance required for consideration* Zachary Piper Solutions is currently seeking a Cloud Systems Administrator to support a US Government RDT&E program . This position is a full-time, onsite role in San Diego, CA . This position is critical in designing...Full time$72.93k - $100k
Mission Technologies, a division of HII, is seeking a System Administrator in San Diego, California, to operate and maintain enterprise system services for the Navy Integrated Training Environment (NITE). Your responsibilities will include managing user accounts and permissions...Full time$60k - $105k
Saalex is actively recruiting for multiple System Administrator I positions located in San Diego, CA. This role is critical in supporting the Navy by administering and maintaining complex IT systems, ensuring compliance with cybersecurity requirements. Candidates will...Flexible hours- Serco is seeking a System Administrator based in San Diego, CA, to support critical military defense missions. This role involves responsibilities like system administration, managing Active Directory, and ensuring system performance. Candidates must have an active DoD...
- A software solutions company based in the United States is looking for skilled professionals knowledgeable in Unix, Linux, and networking to join its team. Candidates should possess a Master's degree in Computer Science, Telecommunications, or Electrical Engineering. This...
$72.93k - $100k
Systems Administrator (Network Communications 2) Requisition Number: 28987 Required Travel: 0 - 10% Employment Type: Full Time / Salaried / Exempt Anticipated Salary Range: $72,933.00 - $100,000.00 Security Clearance: Secret Level of Experience: Mid The Navy Integrated...Full timeLocal area- Allied Express Solutions is seeking an FPC Enterprise Systems Administrator in San Diego, CA, to optimize our enterprise systems and enhance operational efficiency. The ideal candidate will manage performance, implement upgrades, and troubleshoot enterprise applications...Remote jobWork from homeFlexible hours
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