IT​/Network System Administrator

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  (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., Ninja One), 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
• Manage server infrastructure (physical and virtual), including provisioning, patching, backup, and lifecycle management
• Monitor network and infrastructure health; lead incident response and root-cause analysis for outages and performance issues
• 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/Ninja One and Microsoft Defender to keep the environment aligned with NIST SP 800-171 control requirements
• Partner with security/compliance stakeholders on System Security Plans (SSPs), POA&Ms, and audit readiness for CMMC assessments
• Document network topology, infrastructure architecture, and disaster recovery/business continuity procedures
• Serve as a secondary/escalation point of contact for basic end-user technical issues (hardware, software, connectivity, account access)
• Provision and configure end-user hardware (laptops, peripherals) in line with security and compliance baselines
• Troubleshoot common Windows/macOS and Office 365 issues for staff as needed
• Support onboarding/offboarding from an infrastructure and access-management perspective (accounts, device enrollment, permissions)

• 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  (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 Ninja One, Manage Engine, 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
• Comfortable providing basic end-user technical support alongside infrastructure duties
• Strong documentation, troubleshooting, and incident-response skills
• Relevant certification preferred (e.g., CompTIA Network+/Security+, CCNA, Microsoft Certified: Intune/Endpoint Manager, or equivalent experience).

Demonstrates expertise in network engineering and systems administration, with a strong focus on managing and securing LAN/WAN, VPN, and firewall infrastructures. Proficient in compliance with CMMC Level 2 and NIST SP 800-171 requirements, ensuring endpoint security and device management through Microsoft Intune and related tools.

• Network Engineering
• Microsoft Entra  (Azure AD)
• Microsoft Intune
• CMMC Level 2 Compliance
• Endpoint Security Management

• LAN/WAN Design
• VPN Configuration
• Firewall Management
• Windows Server Administration
• MacOS Administration
• Endpoint Compliance Management
• Network Segmentation
• Patch Management
• Incident Response
• Documentation

• Troubleshooting
• Technical Support
• Communication
• Collaboration
• Problem-Solving

• CompTIA Network+
• CompTIA Security+
• CCNA
• Microsoft Certified:
  Intune/Endpoint Manager

• CMMC Level 2
• NIST SP 800-171
• ITAR Compliance
• Network Security Fundamentals
• Infrastructure Management

• Microsoft Defender
• ESET
• Ninja One
• Manage Engine
• Office 365
• DNS/DHCP
• MFA
• Endpoint Protection
• Disaster Recovery
• Business Continuity