IT/Network System Administrator

Duties & Responsibilities

• Design, deploy, and maintain LAN/WAN, wireless, VPN, and firewall infrastructure across Lynk office and lab locations
• Own network architecture decisions — segmentation, routing, VLANs, redundancy, and capacity planning as the company scales
• Administer and harden core infrastructure: Microsoft Entra ID (Azure AD), Conditional Access, DNS/DHCP, Office 365, and endpoint security (ESET, Microsoft Defender) at the systems-administration level
• Manage endpoint and device compliance through Microsoft Intune and MDM platforms (e.g., NinjaOne), including policy design, patch management, and fleet-wide enforcement
• Deploy, monitor, and maintain security posture via Microsoft Defender (Endpoint/365) — threat detection, alerting, and remediation
• Implement and maintain infrastructure security controls (firewalls, MFA, network segmentation, endpoint protection) in line with ITAR and export-control obligations
• Support Lynk's CMMC Level 2 compliance program — maintain endpoint compliance (patching, configuration baselines, encryption, access control) across the device fleet and evidence controls for audits
• Monitor and remediate endpoint compliance drift via Intune/NinjaOne and Microsoft Defender to keep the environment aligned with NIST SP 800-171 control requirements
• Document network topology, infrastructure architecture, and disaster recovery/business continuity procedures

Qualifications

• 4+ years of experience in network engineering, systems administration, or infrastructure management
• Hands-on experience designing and maintaining LAN/WAN, VPN, firewall, and wireless network infrastructure
• Strong Windows Server and macOS environment administration experience
• Experience managing Microsoft Entra ID (Azure AD), Conditional Access, and Office 365 at an administrative/architectural level
• Hands-on experience with Microsoft Intune for device/endpoint management and compliance policy
• Experience with MDM platforms such as NinjaOne, ManageEngine, or similar
• Experience deploying and managing Microsoft Defender (Endpoint/365) or comparable endpoint security/EDR tooling
• Understanding of network security fundamentals: firewalls, segmentation, and endpoint protection
• Familiarity with CMMC Level 2 / NIST SP 800-171 control requirements and experience maintaining endpoint compliance in a regulated environment
• Strong documentation, troubleshooting, and incident-response skills
• Relevant certification preferred (e.g., CompTIA Network+/Security+, CCNA, Microsoft Certified: Intune/Endpoint Manager, or equivalent experience)
• Bonus: Experience with PowerShell or other scripting/automation tools
• Direct experience preparing for or supporting a CMMC Level 2 assessment (SSP/POA&M development, C3PAO audit support)
• Experience supporting infrastructure in a regulated or export-controlled (ITAR) environment
• Previous startup experience is a strong plus