Hybrid IT Infrastructure & Security Admin

Lynk Global, Inc.

Chantilly (VA)

Hybrid

USD 90,000 - 120,000

Full time

12 days ago

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Benefits offered by this job

PowerShell scripting

CMMC readiness support

ITAR/compliance experience

Startup experience

Job summary

Lynk Global, Inc. is seeking an IT Infrastructure & Systems Administrator to support and maintain core IT infrastructure, focusing on Microsoft identity, endpoint management, and security across Chevy Chase, MD and Chantilly, VA locations.

You will administer Entra ID, Intune, Defender, Office 365, and MDM tooling, monitor compliance, and assist with ITAR/CMMC requirements. This role includes firewall, VPN, DNS/DHCP, and network administration alongside end-user support as needed.

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.
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)

Responsibilities

Administer and harden core infrastructure: Microsoft Entra ID (Azure AD), Conditional Access, DNS/DHCP, Office 365, and endpoint security (ESET, 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.
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 across the device fleet and evidence controls for audits.
Monitor and remediate endpoint compliance drift via Intune/NinjaOne and Defender to keep the environment aligned with NIST SP 800-171 control requirements.
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.
Deploy, monitor, and maintain security posture via Defender - 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.
Partner with security/compliance stakeholders on SSPs, POA&Ms, and audit readiness for CMMC assessments.
Document network topology, infrastructure architecture, and disaster recovery/business continuity procedures.