Sr. System Administrator

Concept Plus; San Diego (CA); On-site; USD 95,000 - 130,000; Full time

Benefits offered by this job

Health insurance

Dental and vision insurance

Paid time off

11 holidays

Performance bonus

Tuition reimbursement

Unlimited training

Collaborative environment

Job summary

Concept Plus is seeking a Senior System Administrator to act as on-site support for a client system. You will manage network troubleshooting, Active Directory identity management, Google Workspace administration, and Windows workstation support to keep the environment secure and available.

The role emphasizes hands-on problem solving, configuring accounts, mapping drives, supporting Meet hardware, VPNs, and collaboration tools.

Qualifications

• Experience managing Active Directory identities for onboarding and offboarding.
• Strong knowledge of Google Workspace administration and SSO/SAML where applicable.
• Proficiency with Windows workstation troubleshooting and endpoint management.
• Familiarity with network basics (Layer 1–3) and wired/wireless diagnostics.

Responsibilities

• Troubleshoot and resolve network, authentication, and device issues on-site.
• Create/modify/delete user accounts; manage OU placement and access permissions.
• Support Google Workspace and Meet hardware; assist with 2FA and SSO issues.
• Assist with hardware setup, imaging, backups, and ticketing documentation.

Skills

Network Troubleshooting

Active Directory

Google Workspace

Windows OS & Endpoint Support

IT Support & Ticketing

Tools

Cisco hardware/OS

VPN

DNS/DHCP

Google Meet Hardware

BitLocker

Job description

About this position

About Concept PlusConcept Plus is a mission-focused technology solutions provider that transforms IT concepts into impactful solutions for federal agencies. Headquartered in Fairfax, VA, we bring the agility, responsiveness, and customer intimacy of a small business combined with the quality and infrastructure of a larger firm.

Recognized as an award-winning Oracle partner, we have delivered innovative solutions across Defense, Intelligence, Civilian, Health IT, and Tribal sectors. Our highly certified experts build systems that drive efficiency, accelerate modernization, and ensure mission outcomes with certainty.

We offer competitive pay, comprehensive health, dental, and vision insurance, paid life insurance, paid time off, 11 paid holidays, performance bonuses, tuition reimbursement, unlimited training, and the opportunity to thrive in a collaborative, flexible, and innovative environment.

For more information, visitwww.conceptplus.com.

About the role

Concept Plus is seeking a Senior System Administrator to act as on-site support for a client system

What you'll do

Network Troubleshooting & Support

Basic understanding of Layer 1, 2, and 3 support. Basic knowledge of Cisco hardware and OS. WiFi troubleshooting. Knowledge of Ethernet and fiber wiring, including basic troubleshooting.

Active Directory & Identity Management

Creating, modifying, and deleting user accounts for staff onboarding/offboardingPutting accounts in other OUs for CAC Waiver or other reasonsDiagnosing account lockout sources (identifying which device/service is triggering lockouts)Managing Organizational Unit (OU) placement for new users and computersTroubleshooting login/authentication failuresManaging service accounts and delegated permissionsJoining/rejoining workstations to the domainConfiguring and troubleshooting mapped network drives

Google Workspace Administration & Support

Account & IdentityProvisioning/deprovisioning Google Workspace accountsTroubleshooting Single Sign-On (SSO) / SAML integrationHelping staff members with Google account passwords and 2-Step Verification (2FA) issuesGmail / EmailDiagnosing email delivery failures (bounce-backs, spam filtering, blacklisting)Configuring and troubleshooting email forwarding and filtersTroubleshooting shared inbox and group email accessCalendars, Drive, and AppsTroubleshooting shared calendar permissions and resource calendars (e.g., conference room booking)Resolving Google Drive sync issues (Drive for Desktop)Managing Shared Drive permissions and accessTroubleshooting Google Forms, Sheets, Docs sharing and permission errorsInvestigating storage quota issuesTroubleshooting offline access and sync conflicts

Windows Workstation & Endpoint Support

Advanced OS troubleshooting (boot failures, blue screens/BSOD analysis)Windows profile corruption repair/rebuildingRegistry edits for application or system issuesDriver installation, updates, and rollbackDiagnosing performance issues (high CPU/memory/disk, startup bloat)Windows Update failures and manual patchingApplication installation, configuration, and repair (beyond standard packages)Disk cleanup, defragmentation, and storage managementBitLocker encryption troubleshooting and recovery key managementConfiguring VPN clients and diagnosing connectivity issuesImaging and reimaging workstationsBackup and data migration during staff member hardware upgrades

Hardware Support & Repair

Peripheral troubleshooting (printers, scanners, docking stations, multi-monitor configurations)Printer driver installation and print queue/spooler troubleshootingSetting up and configuring new workstations and laptopsDiagnosing power and charging issues on laptopsComputer and peripheral firmware updates and issues that arise

Network & Connectivity (Tier 2 Scope)

Troubleshooting wired/wireless connectivity for endpointsDiagnosing DNS and DHCP client-side issues (ipconfig, nslookup, ping, tracert)Configuring and troubleshooting network printersResolving WiFi authentication issues with NWA VEBasic switch port connection troubleshooting and verification (possibly escalating to Tier 3)

VTC / Conference Room / Google Meet Support

Google Meet Hardware KitTroubleshooting Google Meet hardware kits compute unit (Chromebox/Chromebase) issuesFirmware and software updates for Meet hardware that brick themTroubleshooting touch controller/tablet connectivity and pairingResolving room calendar sync issues on Meet devicesAudio/VideoTroubleshooting camera issues (no video, poor quality, framing/auto-zoom)Diagnosing microphone and speaker problems (no audio, echo, feedback)Configuring and troubleshooting speaker bars/micsResolving audio routing and input/output device selection issues in big conference roomTrouble shoot Crestron audio video switcherDisplays & ProjectorsTroubleshooting projector connectivity (HDMI, wireless casting)Diagnosing display/resolution/scaling issuesManaging screen sharing and presentation failuresBulb/lamp and projector maintenance coordinationTV/monitor input and signal troubleshootingMeetings & ConnectivityDiagnosing Google Meet join failures and dropped callsTroubleshooting bandwidth/network quality issues affecting meetingsConfiguring interoperability with other VTC platforms (Zoom, Teams) if applicableTesting and validating rooms before high-priority meetingsCable management and physical connection troubleshootingSupporting live meetings/VIP events and on-site event coverage

Ticketing, Documentation & Process

Documenting resolutions and updating knowledge base articles and IT SOPCreating internal how-to guides and troubleshooting scripts for Tier 1Root cause documentation for recurring issuesFollowing up on long-running tickets and coordinating with usersMentoring/coaching Tier 1 staff

Additional Responsibilities

License management and software asset trackingCertificate installation and renewal on endpointsMobile device support (email/app configuration, MDM enrollment)Verizon Wireless Business account phone