Senior System Administrator TS/SCI w/ Poly

Momentum Engineering, Inc.; Maryland; On-site; USD 110,000 - 170,000; Full time

Benefits offered by this job

11 paid holidays

3 weeks PTO

Group medical plan

Dental insurance

Vision insurance

Life insurance

STD/LTD plans

Job summary

Momentum Engineering, Inc. seeks a Mid-Senior System Administrator to maintain a large, complex network environment. The role supports system engineering requests, upgrades, and maintenance across air-gapped domains and distributed systems.

The candidate should possess strong system administration, troubleshooting, and security skills, with experience across Windows/Linux, AD, VMware, and multiple security tools. Defense-focused, fast-paced team culture and travel as needed.

Qualifications

• Active Top Secret/SCI clearance with NSA Full Scope Polygraph.
• 8+ years of relevant experience as a systems administrator.
• Experience supporting end users and technical staff (developers, testers, engineers).
• Proficient with Windows Server 2012R2, 2016, 2019 and Active Directory.
• Experience with Linux and Microsoft-based servers/workstations; Windows 2019.
• Experience with OS/hardening in DISA, Best Practices, High Assurance environments.
• Experience with software/hardware deployment, patches, backups and restore functions.
• Familiarity with SALT, Ansible, Splunk, Puppet, SolarWinds, Nessus.
• Experience with Red Hat 7/8 and VMware; Tomcat/IIS/SQL exposure.
• Documentation for security accreditation and certification; strong security basics.
• Knowledge of PKI, HSM-based key validation and NTP synchronization.
• Understanding of information security principles and secure architectures.
• Experience with Windows/Linux, VMware, networking gear (Switches/Routers/LANs).
• Willingness for occasional travel.

Responsibilities

• Install and administer systems, applications, and processes, ensuring timely issue resolution.
• Optimize server and desktop configurations for continuous, efficient operation.
• Perform security management and application performance optimization.
• Sustainment of web-based information storage and sharing systems.
• Configure, patch, renew certificates, manage vulnerabilities, and AD.
• Identify and fix hardware/software issues; provide re-work solutions.
• Document complex server/network environments for incident resolution.
• Communicate outages and upgrades with users and management.

Skills

System administration

Active Directory

Windows Server

Linux servers

PowerShell

VMware

Education

Bachelor's or Master's degree in System Engineering, Computer Science, Information Systems, Engineering Management, or related field

Tools

SALT

Ansible

Splunk

Puppet

SolarWinds

Nessus

Red Hat 7

Red Hat 8

VMware

Job description

Momentum Engineering, Inc. seeks a Mid-Senior System Administrator to maintain a large, complex network environment. The role supports system engineering requests, upgrades, and maintenance across air-gapped domains and distributed systems.

The candidate should possess strong system administration, troubleshooting, and security skills, with experience across Windows/Linux, AD, VMware, and multiple security tools. Defense-focused, fast-paced team culture and travel as needed.