Security Systems Administrator

We are seeking a highly skilled IT Help Desk & Microsoft 365 Administrator to support a growing government contracting organization based in Bethesda, MD. This role is responsible for delivering Tier I-III technical support while administering and securing Microsoft 365 and SharePoint environments within a CMMC and ISO-compliant framework.

The ideal candidate is comfortable supporting 50-300 end users, understands federal contractor compliance requirements, and can operate effectively in a secure, regulated IT environment.

What you’ll do

End-User Support

• Provide Tier I-III help desk support for 50-300 employees (onsite and remote)

• Troubleshoot hardware, software, network, and cloud-based systems Manage onboarding/offboarding processes (account provisioning, permissions, device setup)

• Support laptops, mobile devices, printers, and conference room technology
• Maintain IT documentation and knowledge base resources

Microsoft 365 & SharePoint Administration

• Administer Microsoft 365 environment (Exchange Online, Teams, OneDrive, SharePoint Online, Azure AD/Entra ID)
• Manage user accounts, licensing, MFA, and conditional access policies
• Configure and maintain SharePoint sites, permissions, workflows, and document libraries
• Support collaboration tools and governance policies
• Monitor system performance, security alerts, and service health

Compliance & Security (CMMC / ISO)

• Support CMMC and ISO 27001 (or similar) compliance requirements
• Assist with implementation and documentation of security controls
• Maintain secure configurations aligned with NIST 800-171
• Participate in internal audits and remediation activities
• Support vulnerability management, patching, and endpoint protection
• Enforce data protection, access control, and retention policies

Infrastructure & Systems Support

• Manage endpoint security tools and MDM (Intune preferred)
• Support VPN, firewall, and basic networking troubleshooting
• Maintain backups and disaster recovery procedures
• Coordinate with third-party MSPs or security vendors as needed

• 3-7+ years of IT Help Desk or Systems Administration experience
• Hands-on experience administering Microsoft 365 and SharePoint Online
• Experience supporting environments with 50-300 users
• Working knowledge of:
• CMMC requirements
• NIST 800-171
• ISO 27001 (or similar security framework)
• Experience with Azure AD / Entra ID, MFA, and conditional access
• Strong documentation and communication skills
• Ability to work onsite in Bethesda, MD as needed, * Proven experience architecting and deploying secure enclaves (e.g., GCC High, Azure Government) designed specifically for Controlled Unclassified Information (CUI) workloads.
• Hands-on expertise implementing and managing technical controls (MFA, FIPS 140-2 encryption, and log retention) to meet NIST SP 800-171 and CMMC Level 2 requirements.
• Experience managing the day-to-day operations of a Covered Contractor Information System (CCIS), including continuous monitoring, vulnerability remediation, and patch management.
• Proficiency in developing and maintaining technical compliance artifacts, such as the System Security Plan (SSP) and Plan of Action and Milestones (POA&M)
• CompTIA Security+, Network+, or similar certification
• Microsoft certifications (MS-900, MS-102, SC-900, etc.)
• Experience in a government contracting (GovCon) environment
• Familiarity with eDiscovery, data loss prevention (DLP), and retention policies
• Experience preparing for CMMC Level 2 assessment

The pay range for this position is between $90,000 and $170,000 per year. This position is benefits-eligible. Our suite of benefits includes Health, Dental, Vision, 401k w/ match, Gym Membership discounts, Volunteer Paid Time Off, and a generous PTO package. We’d love to tell you more! Apply today!