ManTech Systems Administrator, Senior in Lexington Park, Maryland

Maintains data files and control procedures for a complex system of networked computers or for a single group of microcomputers linked to a host workstation, or mainframe. Responsible for system security and data integrity. Assigns passwords and monitors use of resources, backs up files as required and responds to management requests for information. Provides technical guidance to lesser-experienced systems administrators.

SECRET Security Clearance Required with eligibility for higher classifications

Working with BrightHPC:

  • Install and configure RHEL 7.x with disk encryption, Bright cluster software on the Head node, andsoftware images.

  • Discuss the nodeprovisioning process.

  • Install and manage workload managers (preferably SGE and SLURM) and apply rpms to softwareimages.

  • Work with managed andunmanaged switches, integrate Windows Active Directory with Bright clusterenvironment, perform user management using Bright's LDAP, and manageBright clusters.

  • Configure and manage various storage technologies (SAN, NAS, and JBOD) and storage vendors (EMC,SanDigital, etc.).

  • Red Hat logical volumemanager, NFS and Samba, apply Red Hat 7.x and cluster patches to Brightenvironment.

  • Work with enterprise levelbackup platform (preferably Commvault) to perform backup, restore snapshotfunctionalities.

  • Using IPMI to perform nodepower management

  • Manage the functionality and efficiency of a system of information technology assets running on one or more operating systems.

  • Develop and monitor policies and standards for allocation related to the use of information technology and computing resources, and assure and sustain the integrity and security of servers, systems and service accounts.

  • Program in an appropriate administrative language, serve as a programmer employing a wide variety of disciplines, and develop and implement testing strategies and document results.

  • Maintain system documentation.

  • Provide advice and training to end-users, and guidance and work leadership to less-experienced staff members.

  • Interact with users and evaluate vendor products; make recommendations to purchase hardware and software, coordinate installation and provide backup recovery.

  • Maintain current knowledge of relevant technologies as assigned.

  • Participate in special projects as required


  • BS or BA degree in a Computer Science or a related scientific discipline or five (5) or more years of experience in systems administration and analysis may be substituted for a BS or BA degree.

  • Desired: Master's Degree from an accredited university in Computer Science or a related scientific discipline.

  • Formal / technical education and certifications on platforms/systems outlined in “Required Skills and Experience .

  • Desired: Have worked 5 years with government agencies.

  • Must be a self-starter who can take senior-leader guidance and intent, and oversee the operations of independent and collaborative, assigned projects.

  • At least five (5) years of experience in a systems administrator / engineer position, and possess an industry standard certifications.

  • Demonstrated experience in analysis simulation environment, configuring/troubleshooting software/hardware enhancements, application deployments, and infrastructure upgrades in a dynamic information systems hosting environment.

  • Possess the following Bright HPC qualifications / experience:

-Installing and configuring RHEL 7.x with disk encryption, Bright cluster software on the Head node, and installing and configuring software images.

-Ability to discuss the node provisioning process.

-Installing and managing workload managers (preferably SGE and SLURM) and applying rpms to software images.

-Working with managed and unmanaged switches, integrating Windows Active Directory with Bright cluster environment, performing user management using Bright's LDAP, and managing Bright clusters.

-Configuring and managing various storage technologies (SAN, NAS, and JBOD) and storage vendors (EMC, SanDigital, etc.).

-Red Hat logical volume manager, NFS and Samba, applying Red Hat 7.x and cluster patches to Bright environment.

-Working with enterprise level backup platform (preferably Commvault) to perform backup, restore snapshot functionalities.

-Using IPMI to perform node power management

  • DoD 8570.01-M compliant to administer information systems.



Equivalent Experience/Education, Bachelor's Degree

Years of Experience

11-13 years w/High School Diploma, 05-07 years w/Bachelors Degree, 02-04 years w/Masters Degree

Position Type





For more than 40 years, ManTech employees have been solving complex problems for the national security community. We are comprised of approximately 10,000 talented employees around the world. We adhere to the simple, no-nonsense values on which ManTech was founded more than four decades ago, aligning squarely with the mission objectives of our customers. As our customer base continues to expand and diversify, we continue to diversify our workforce and solutions. Half our employees have a military background, and more than 70 percent hold a government security clearance. As a leading provider of innovative technology services and solutions for the nation's defense, security, space, and intelligence communities; we hold nearly 1,000 active contracts with more than 40 different government agencies.

ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Waretime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law. If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services.

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