Sr. Systems Administrator

Sr.

Systems Administrator Location:

Onsite Duration:

Direct hire This full-time position will oversee the administration, maintenance and security of a distributed IT infrastructure supporting multiple Microsoft 365 tenants and a geographically dispersed workforce. This role is reponsible for managing both on-site and remote environments across multiple locations and time zones, ensuring operational continuity, regulatory compliance, and enterprise-level security standards. The ideal candidate is a highly analytical, service-oriented IT professional with deep Microsoft 365 expertise and experience operating within regulated environments such as CMMC and

NIST 800-171.

Key Responsibilities:

Microsoft 365 Administration Administer multiple Microsoft 365 tenants, including Exchange Online, SharePoint Online, Microsoft Teams, Entra ID (Azure AD), Conditional Access Policies; and Multi-Factor Authentication (MFA) Manage identity governance, security policies, and tenant configurations Perform log reviews and monitor system activity to ensure compliance and security integrity Infrastructure & Systems Management Administer physical and virtual servers across distributed environments Manage network infrastructure including firewalls, switches, and remote office connectivity Oversee patch management, vulnerability remediation, and endpoint protection Provide Tier 2/3 escalation support Support and manage Remote Monitoring & Management (RMM) tools Administer VoIP systems Security & Compliance Ensure compliance with CMMC Level 1 (or higher), NIST 800-171, and

NIST 800-53

(as applicable) Conduct internal system compliance reviews and assessments Develop and maintain technical documentation and Standard Operating Procedures (SOPs) Participate in IT Change Boards and change management processes Support audit readiness initiatives Physical Security Systems Oversee IP-based camera systems Administer badge readers and access-control systems Ensure physical security systems integration with cybersecurity policies Collaboration & Strategic Support Work closely with development teams and systems engineers to support development, testing and deployment Participate in disaster recovery planning and business continuity strategies Assist with vendor management and contract negotiations

Required Qualifications :

Ability to obtain and maintain a DoW security clearance (active clearance preferred). Bachelor s degree in IT Security, Computer Science, Information Systems Technology, or a related discipline, or equivalent professional experience. Minimum of seven years of IT Administration experience, including at least three years in a regulated environment (CMMC level 1 or higher, NIST 800-171, NIST 800-53) . Exceptional written and verbal communications skills. Strong service orientation and the ability to work independently. Advanced analytical and problem-solving abilities. Excellent organizational, time management and customer service skills. Experience in participating in IT Change Boards and conducting system compliance assessments. Experience drafting SOPs to support IT consistency and audit readiness. Networking 3+ years of experience with firewalls, switches, and physical security hardware. Prior experience with vendor management, contract negotiations, disaster recovery planning, and business continuity strategies. At least three years of Microsoft 365 Administration experience.

Preferred Qualifications :

CompTIA Security + (Active or ability to obtain) Microsoft 365 Certified Administrator CCNA Certification "Equal Opportunity Employer/Veterans/Disabled"