Network System Administrator

Chevy Chase, MD — Hybrid (2–3 days onsite/week), with periodic travel to Chantilly, VA ABOUT LYNK GLOBAL Lynk Global is the inventor of satellite direct-to-device (D2D) technology and holds the world's only commercial license from the FCC to operate a commercial D2D system. Today, Lynk allows mobile network operators' subscribers to send and receive text messages to and from space via standard, unmodified mobile devices. Lynk's service has been tested and proven on all seven continents, has regulatory approvals in more than 30 countries, and is currently being deployed commercially under more than 40 MNO commercial service contracts covering approximately 50 countries. Our technology will enable all 8 billion people on the planet to stay connected with the phone already in their pocket. Everywhere. No matter what. By joining Lynk, you will have the opportunity to directly touch the lives of billions. Your mission will be to bring mobile broadband to billions, pull hundreds of millions out of poverty, and save countless lives. JOB SUMMARY The 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). DUTIES & 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 BASIC END-USER IT SUPPORT - 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-managem…