Senior Systems Administrator - Military veterans preferred

ManTech (


  full-time   employee

United States

All ManTech employees will need to meet the requirements set forth in Executive Order 14042 and the Safer Federal Workforce Task Force Guidance requiring all covered contractor personnel to be fully vaccinated against COVID-19.

Secure our Nation, Ignite your Future

ManTech provides mission-focused technology solutions and services for U.S. defense, intelligence and federal civilian agencies. In business for more than 52 years, we excel in full-spectrum cyber, data collection & analytics, enterprise IT, and systems and software engineering solutions that support national and homeland security.

The IT and O&M team of the National Media Exploitation Center (NMEC) is critical in supporting DoD, Federal, and IC partners’ Global War on Terrorism efforts by providing system engineering; administration; performance improvement; system risk management; data management; network operations and monitoring; and systems and business process automation services for the day-to-day operation of DOMEX Information Technology Systems: maintaining effective positive control of system resources, workflows, and DOMEX operations.

Currently, ManTech is seeking a Senior Systems Administrator to join our team in Bethesda, MD.

Responsibilities include, but are not limited to:

  • Perform system administration of specialized applications and systems to include installation, configuration, maintenance, patching, and backup/restore.
  • Assist with creating, editing, and managing changes to network or system access control lists.
  • Use and recommend automated tools to implement policies and procedures
  • Limited travel in the National Capital Region (NCR) area (e.g., DC, Reston, Springfield).

Basic Qualifications:

  • Bachelor Degree (or related experience) and 2-5 or more years of related experience.
  • Department of Defense (DoD) 8570 Compliant, IAT Level II minimum or obtain certification within the first 90 days of employment. 
  • Demonstrated experience with a variety of server and enterprise application architectures within an environment to include experience with Windows Server 2016/2019, Active Directory, IIS, DNS, DHCP, Exchange, DFS, and experience implementing file, email, and active directory services across multiple geographically dispersed data centers.
  • Provide first contact and incident resolution to customers with hardware, software, and application problems for both customer telephone support and electronically submitted requests.
  • Assist with troubleshooting systems hardware and software when issues occur.

Preferred Qualifications:

  • Experience with DODIIS OS, e.g., Windows 10, Server 2016, CentOS or Red Hat Linux, VMware ESX.
  • Active Directory (AD) experience to include Active Directory Federation Services (ADFS), Group Policy, AD best practices, establishing an AD roadmap, and strong knowledge of AD zone types as well as multi forest design and communications.
  • Experience standing up domains to include PowerShell, hands-on experience in IAM Identity and Access Management (IAM) / Role-Based Access Control (RBAC), and a working knowledge of system hardening (STIGs, SRGs, regulatory compliance)
  • Experience with patch management, e.g., SCCM.
  • Experience with monitoring and/or vulnerability scanning software, e.g., ACAS, Splunk, SolarWinds.
  • Experience with Project Management and/or Service Desk software, e.g., Jira, Jira Service Desk, Service Central.

Security Clearance Requirements:

  • Current TS/SCI clearance with ability to obtain a counterintelligence (CI) polygraph.

Physical Requirements:

  • Able to remain in a stationary position 50%.
  • Constantly positions self to maintain computers in the lab, including under the desks and in the server closet.
  • Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.
  • Able to detect, Determine, Perceive, Identify, Recognize, Judge, Observe, Inspect, Estimate, & Assess.
  • The person in this position frequently communicates with co-workers, management and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations.


For all positions requiring access to technology/software source code that is subject to export control laws, employment with the company is contingent on either verifying U.S.-person status or obtaining any necessary license. The applicant will be required to answer certain questions for export control purposes, and that information will be reviewed by compliance personnel to ensure compliance with federal law. ManTech may choose not to apply for a license for such individuals whose access to export-controlled technology or software source code may require authorization and may decline to proceed with an applicant on that basis alone.

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 Wartime 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.

If you are a qualified individual with a disability or a disabled veteran, you have the right to request an accommodation if you are unable or limited in your ability to use or access as a result of your disability. To request an accommodation please click and provide your name and contact information.