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Senior Systems Administrator (Linux)

Job Duties and Responsibilities

Entering ManTech’s 50th year, we hold the distinct honor of being named a “Top 100 Global Technology Company” by Thomson Reuters. We have earned this and many other accolades over the years for our dedication to serving the missions of our nation’s most important customers: U.S. Intelligence, Defense and Federal Civilian agencies. All know us as a trusted partner offering best-in-class solutions in cyber, data collection & analytics, enterprise IT, and systems and software engineering tailored to meet their specific requirements.


Become an integral part of a diverse team in the Mission, Cyber and Intelligence Solutions (MCIS) Group.  Currently, ManTech is seeking a motivated, mission oriented Systems Admin(s), in the Hanover, MD area, with strong Customer relationships. 

Become an integral part of a diverse team that leads the world in Mission, Cyber, and Intelligence Solutions. At ManTech International Corporation, you will help protect our national security while working on innovative projects that offer opportunities for advancement.

Responsibilities include:
•OS (Linux) - (Red Hat version 5 or higher). Linux Administration
•Patch and update Linux and VM systems.
•Build Red Hat OpenShift (container based software deployment) clusters in virtual environment. Configure and install Red Hat OpenShift container  Platform.
•Infrastructure Management: Install and configures VMware Infrastructure Server.
•Build new development, test and production environments utilizing Dell Blade servers and VMware.
•Install and configure VMware ESX server on Dell Blades.
•Maintain Red Hat Satellite Servers to include creation of groups, users, bootstrap scripts, and activation keys
•Deploy updates to packages via remote commands
•Install and configure infrastructure related software such as DNS, McAfee EPO Servers, CENTRIFY, LDAP, DHCP, and Linux repositories for patching and updates.
•Performed daily task of all virtual environments to include building new virtual machines, updating DNS and troubleshooting system problems.
•Create documentation for Linux builds and upgrades.
•Built servers for deployment of java web applications
•Setup Red Hat clusters for load balancing
•Install and configure infrastructure applications and support integration with critical application environment.
•Setup and configure VM client systems using VSAN storage, PURE or NETAPP.
•Support Certification and Accreditation of Systems.
•Introduce and integrate new technologies into existing data center environments
•Analyze system logs and identifying potential issues with computer systems.
•Monitor virtual Infrastructure increasing and decreasing resources based on requirements.
•Answer technical queries and assist developers and end users
•Troubleshoot any reported problems.
•Apache NiFi experience (add new NiFi nodes, configure NiFi cluster, create and troubleshoot dataflows).
•Scripting (creating new scripts and updating existing for Apps).
•Security + Certified
•Tier III support
•On call / After hour support


Requires a Bachelor's Degree and six to nine years experience or equivalent education.


See Qualifications

Years of Experience

See Qualifications
Company Name:
Security Clearance:
Top Secret / SCI
Fort George G Meade, Maryland
United States
Not Specified
Job Number:

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