Enterprise IT Network Administrator

Responsibilities

• Design, implement, maintain, and troubleshoot enterprise network infrastructure, including LAN, WAN, wireless, VPN, and Internet connectivity.
• Administer and support network hardware including switches, routers, firewalls, and wireless access points.
• Monitor network performance, availability, and capacity; proactively identify and resolve issues.
• Manage network segmentation, VLANs, routing, switching, and access control policies.
• Affiliate with designing and maintaining secure network architectures that support compliance with CMMC Level 2 and NIST 800-171 requirements.
• Support multi-site connectivity and remote workforce infrastructure.

Systems & Infrastructure Administration

• Administer Windows Server environments, Active Directory, Group Policy, DNS, DHCP, and related services.
• Support virtualization platforms such as VMware or Hyper-V.
• Manage enterprise storage, backup, disaster recovery, and business continuity solutions.
• Maintain endpoint management platforms and systems lifecycle processes.
• Implement and maintain system configurations that align with security baselines and compliance requirements.

Security & Compliance

• Implement and maintain security controls aligned with organizational and regulatory requirements.
• Manage firewalls, VPNs, endpoint security solutions, and identity management systems.
• Participate in vulnerability management, patching, incident response, and remediation activities.
• Affiliate with audits, documentation, and compliance initiatives related to defense industry requirements.
• Monitor and investigate security alerts and suspicious activity.
• Affiliate with System Security Plan (SSP) documentation, Plans of Action and Milestones (POA&M), evidence collection, and assessment readiness activities.
• Collaborate with internal stakeholders to ensure systems handling Controlled Unclassified Information (CUI) meet applicable security requirements.

User & Technical Support

• Provide Tier II/III support for complex network and infrastructure issues.
• Collaborate with Help Desk and engineering teams to resolve escalated technical problems.
• Develop and maintain technical documentation, procedures, and architecture diagrams.
• Participate in after-hours maintenance activities and on-call support as needed.