IT/Network System Administrator

Lynk•Chevy Chase, MD

1d•Hybrid

About The Position

The IT/Network System Administrator will administer and maintain the reliability of Lynk's corporate network and core infrastructure — connecting Chevy Chase, MD and Chantilly, VA and supporting a globally distributed, mission-critical operation. This role is responsible for network administration, server and systems infrastructure, and the security/compliance posture of Lynk's infrastructure stack, including maintaining endpoint compliance in support of Lynk's CMMC Level 2 requirements. The role also serves as an escalation point for basic end-user IT support. This position is based in our Chevy Chase, MD office and will require some travel to our Chantilly, VA office as needed (Hybrid: 2–3 days onsite per week).

Requirements

4+ years of experience in network engineering, systems administration, or infrastructure management
Hands-on experience administering 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, VPN, 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

Nice To Haves

Relevant certification preferred (e.g., CompTIA Network+/Security+, CCNA, Microsoft Certified: Intune/Endpoint Manager, or equivalent experience)
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

Responsibilities

Configure, deploy, and maintain LAN/WAN, wireless, VPN, and firewall infrastructure across Lynk office and lab locations
Administer network segmentation, routing, and VLANs, and support 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
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, VPN, 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
Partner with security/compliance stakeholders on System Security Plans (SSPs), POA&Ms, and audit readiness for CMMC assessments
Document network topology, infrastructure configuration, 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)