Sr. System Administrator

About this position

About Concept Plus
Concept 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,

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

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.

Creating, modifying, and deleting user accounts for staff onboarding/offboarding

Putting accounts in other OUs for CAC Waiver or other reasons

Diagnosing account lockout sources (identifying which device/service is triggering lockouts)
Managing Organizational Unit (OU) placement for new users and computers

Troubleshooting login/authentication failures

Managing service accounts and delegated permissions

Joining/rejoining workstations to the domain

Configuring and troubleshooting mapped network drives

Account & Identity Provisioning/deprovisioning Google Workspace accounts

Troubleshooting Single Sign-On (SSO) / SAML integration

Helping staff members with Google account passwords and 2-Step Verification (2FA) issues

Gmail / Email Diagnosing email delivery failures (bounce-backs, spam filtering, blacklisting)
Configuring and troubleshooting email forwarding and filters

Troubleshooting shared inbox and group email access

Calendars, Drive, and Apps Troubleshooting shared calendar permissions and resource calendars (e.g., conference room booking)
Resolving Google Drive sync issues (Drive for Desktop)
Managing Shared Drive permissions and access

Troubleshooting Google Forms, Sheets, Docs sharing and permission errors

Investigating storage quota issues

Troubleshooting offline access and sync conflicts

Advanced OS troubleshooting (boot failures, blue screens/BSOD analysis)
Windows profile corruption repair/rebuilding

Registry edits for application or system issues

Driver installation, updates, and rollback

Diagnosing performance issues (high CPU/memory/disk, startup bloat)
Windows Update failures and manual patching

Application installation, configuration, and repair (beyond standard packages)
Disk cleanup, defragmentation, and storage management

BitLocker encryption troubleshooting and recovery key management

Configuring VPN clients and diagnosing connectivity issues

Imaging and reimaging workstations

Backup and data migration during staff member hardware upgrades

Peripheral troubleshooting (printers, scanners, docking stations, multi-monitor configurations)
Printer driver installation and print queue/spooler troubleshooting

Setting up and configuring new workstations and laptops

Diagnosing power and charging issues on laptops

Computer and peripheral firmware updates and issues that arise

Troubleshooting wired/wireless connectivity for endpoints

Diagnosing DNS and DHCP client-side issues (ipconfig, nslookup, ping, tracert)
Configuring and troubleshooting network printers

Resolving WiFi authentication issues with NWA VEBasic switch port connection troubleshooting and verification (possibly escalating to Tier
3)

Google Meet Hardware Kit Troubleshooting…