Systems Administrator-IT-IC3, Group 95 (Top Secret)

MIT Lincoln Laboratory•Lexington, MA

15d•$95,700 - $126,700•Onsite

About The Position

Group 95 is seeking a Level 3 IT Systems Administrator to join a highly collaborative team supporting one of MIT Lincoln Laboratory's largest and fastest-growing classified computing environments. This infrastructure enables critical national security missions and supports a diverse community of engineers, researchers, and operational users. In this role, you will administer and enhance a modern multi-platform environment that includes Windows and Linux systems, VMware virtualization, enterprise storage, Active Directory, networking infrastructure, and cybersecurity technologies. You'll solve complex technical challenges, influence infrastructure architecture decisions, and help scale a mission-critical environment supporting high-impact national security programs. The ideal candidate is a technically curious problem solver who enjoys working across multiple technologies, collaborating with cross-functional teams, and delivering reliable, secure solutions in a classified environment.

Requirements

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 operating system imaging, disk encryption, and endpoint management technologies.
Ability to diagnose and resolve hardware, software, and networking problems.
Strong troubleshooting skills with the ability to communicate effectively with technical and non-technical stakeholders.
Solid understanding of security and cyber-hardening practices.
Excellent written and verbal communication skills.
Must possess an active Top-Secret Clearance with SCI eligibility

Nice To Haves

Experience with VMware and vCenter.
Experience configuring and maintaining Cisco network equipment.
Experience with Linux package management and automation tools (e.g., YUM, DNF, RPM).
Experience developing automation solutions using PowerShell, Bash, Python, or similar scripting languages.
Familiarity with RMF and associated frameworks and guidance (e.g., JSIG, ICD-503, CNSSI 1253).
Technical experience securing networks and systems utilizing DISA STIGs and/or SRGs is highly desired.
Background in mission-critical environments.
Experience with security plans, procedures, and compliance (e.g., DoD 8140).
Security+ certification. If not currently held, will be required to obtain this or equivalent certification within 6 months of hire under DoD 8140 (formerly 8570) requirement.

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 perform 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.