Top Secret Systems Administrator (IC3) – Classified IT

MIT Lincoln Laboratory; Lexington (MA); On-site; USD 95,700 - 126,700; Full time

Benefits offered by this job

Comprehensive health plans

MIT‑funded pension

Matching 401K

Paid leave

Job summary

MIT Lincoln Laboratory in Lexington, MA, seeks a Systems Administrator – IT (IC3), Group 95 (Top Secret). The role involves administering a secure air‑gapped environment, virtualization, storage, identity management, networking, and OS services for mission‑critical users.

Requirements include 4+ years in a classified setting, Windows/Linux proficiency, AD/GPO expertise, strong networking, and an active TS clearance with SCI eligibility. Collaboration across teams is essential.

Qualifications

• 4+ years of systems administration experience in a classified environment.
• Experience supporting Windows and Linux operating systems in classified or highly secure environments.
• Strong knowledge of TCP/IP, DNS, and networking fundamentals.
• Proficiency in Active Directory and Group Policy.
• Experience deploying and securing Windows and Linux endpoints, including imaging, encryption, and endpoint management technologies.
• Ability to diagnose and resolve hardware, software, and networking problems.
• Strong troubleshooting skills and communication with technical and non-technical stakeholders.
• Solid understanding of security and cyber-hardening practices.
• Excellent written and verbal communication skills.
• Active Top-Secret Clearance with SCI eligibility.

Responsibilities

• Administer, maintain, and enhance a secure air‑gapped computing environment supporting mission‑critical users and applications.
• Administer and maintain virtualization, storage, identity management, networking, and operating system services supporting enterprise‑class classified infrastructure.
• Maintain compliance through regular OS and software patching.
• Troubleshoot performance issues and recommend system upgrades.
• Specify, implement, and test system configurations and upgrades across multiple platforms.
• Collaborate with vendors, security, and internal teams on procurements, installations, and upgrades.
• Implement security measures aligned with government and lab policies.
• Manage data backups, recoveries, and license renewals.
• Identify opportunities for automation, process improvement, and infrastructure modernization.
• Participate in infrastructure planning, capacity management, and technology refresh initiatives.
• Lead technical investigations and drive resolution of complex infrastructure and operational challenges.

Skills

Windows/Linux administration

Networking fundamentals

Active Directory & GPO

Security hardening

Troubleshooting

Communication

Top Secret clearance

Tools

VMware vCenter

Cisco networking

YUM/DNF/RPM

PowerShell

Bash

Python

Job description

MIT Lincoln Laboratory in Lexington, MA, seeks a Systems Administrator – IT (IC3), Group 95 (Top Secret). The role involves administering a secure air‑gapped environment, virtualization, storage, identity management, networking, and OS services for mission‑critical users.

Requirements include 4+ years in a classified setting, Windows/Linux proficiency, AD/GPO expertise, strong networking, and an active TS clearance with SCI eligibility. Collaboration across teams is essential.