Systems Administrator

Adams Communication & Engineering Technology, Inc. • Remote, US,

3d

About The Position

ACET is seeking a motivated IT professional to support day-to-day Microsoft 365 administration while assisting with security monitoring and response across Microsoft Defender and Sentinel. This role blends traditional helpdesk responsibilities with hands-on exposure to security operations and will grow into a more advanced security and systems engineering position over time. This role will also support security and compliance initiatives aligned with frameworks such as CMMC and NIST 800-171.

Requirements

• 1–3 years of IT support, helpdesk, systems administration or similar experience
• Basic experience with Microsoft 365 administration
• Familiarity with security concepts (MFA, phishing, endpoint protection)
• Experience with Windows environments and troubleshooting
• Strong problem-solving, analysis, and communication skills
• Ability to prioritize and manage multiple tasks
• Must be U.S. Citizen to apply

Nice To Haves

• Exposure to Microsoft Defender, Sentinel, or similar security tools
• Experience with Azure AD / Entra ID and Conditional Access
• Familiarity with GCC or GCC High environments
• Experience with networking or tools like Cisco Meraki
• Basic understanding of CMMC, NIST 800-171, or similar compliance frameworks and their application in Microsoft 365 environments
• Security certifications (Security+, SC-900, or similar)

Responsibilities

• Provide Tier 1–2 support for Microsoft 365 (Exchange Online, Teams, SharePoint, OneDrive)
• Manage user accounts, licenses, and access via Microsoft Entra ID
• Troubleshoot endpoint, identity, and application issues across Windows environments
• Support MFA, conditional access, and identity-related issues
• Document issues, resolutions, and standard operating procedures
• Monitor Microsoft Defender and Sentinel dashboards for alerts and incidents
• Investigate and triage security alerts (phishing, endpoint threats, suspicious logins)
• Escalate or remediate security incidents following defined processes
• Assist with vulnerability identification and basic remediation tracking
• Maintain awareness of threat trends and recommend improvements
• Assist with configuration and maintenance of Microsoft 365 GCC High environment
• Support implementation of security controls (Conditional Access, Defender policies, etc.)
• Participate in hardening efforts across endpoints, identities, and cloud workloads
• Help manage and monitor third-party to include Cisco Meraki, Kaseya VSA X, Connectwise PSA, & AvePoint Cloud Backup
• Contribute to audits, compliance efforts, and security documentation
• Support rollout of new security tools and configurations
• Assist senior IT staff with security and infrastructure projects
• Continuously develop skills in cloud security, identity, and endpoint protection
• Assist with the creation and upkeep of company compliance documents
• Involvement in other duties as assigned

Benefits

• Comprehensive Medical, Dental, and Vision coverage
• Life insurance, AD&D, and Short- and Long-Term Disability
• 401(k) Program
• Wellness programs
• Paid Time Off
• 11 Paid Holidays
• Employee Referral Program
• Employee Assistance Program

What This Job Offers

• Job Type: Full-time
• Career Level: Entry Level
• Education Level: No Education Listed