System Administrator - Military veterans preferred

ManTech (


  full-time   employee

District of Columbia
United States

Where applicable, confirmation that you meet customer requirements for facility access which may include proof of vaccination and/or attestation and testing, unless an accommodation has been approved.

Secure our Nation, Ignite your Future

Become an integral part of a diverse team while working at an Industry Leading Organization, where our employees come first. At ManTech International, you’ll help protect our national security while working on innovative projects that offer opportunities for advancement. 


We take National Security seriously. We focus on strategic and unified work to strengthen the security, resiliency, and workforce of the cyber ecosphere. This is your opportunity to join a team that is making an impact on protecting National interests including state, local, tribal and territorial Governments and critical infrastructure. 


Currently, ManTech is seeking a motivated, mission and customer-oriented System Administrator to join our team in the Washington D.C. area.  


Responsibilities include but are not limited to: 

  • Provides support for implementation, troubleshooting and maintenance of IT systems 

  • Perform the activities of configuration and system operations (mainframe, mini, or client/server based, etc.)

  • Perform system capacity analysis and planning, optimizing, system operations, and resource utilization 

  • Aid users in accessing and using business systems; responsibilities include Windows Administrators, SharePoint Administrators, VM Ware Administrators, and other Tools Administrator positions 

  • Manages IT system infrastructure and any processes related to these systems  

  • Provides support to IT systems including day-to-day operations, monitoring, and problem resolution for all the client problems

  • Provides problem identification, diagnosis, and resolution of problems 

  • Provides support for the deployed systems and hardware problems and remains involved in the resolution process 

  • Provides support for enterprise programs and applications, e.g., (VMWare, RedHat Linux, CentOS Linux, Windows Server, Citrix, LDAP, Apache HTTP Server, Apache Tomcat, and various scripting languages including Perl, Python, Java, Bash, PowerShell, VB Script) 


Basic Qualifications: 

  • One of the following certifications: CCNA Security, GICSP, GSEC, Security+ CE, CND, SSCP, Microsoft Certified Systems Administrator (MCSA) or Microsoft Certified Solutions Expert (MCSE) 

  • Bachelor’s degree in Computer Science or related field  

  • A minimum of (7) seven years of relevant experience 

  • Experience with virtualized environments and knowledge of provisioning hardware, storage, resources, and configuration/administration, including high-availability and failover services for cloud infrastructures 

  • Experience with O&M of Windows applications such as WSUS, Exchange, SharePoint, SCCM, and Splunk 

  • Experience with RAIDs, SANs, High Availability, Backups and Disaster Recovery. 

  • Knowledge in configuring network switches, working with VLANs, and knowledge of routing protocols 

  • Knowledge in security hardening of operating systems in a standalone environment as well as through GPOs

  • Knowledge, skills and abilities in SAFe Agile processes and methods 


Preferred Qualifications: 

  • Master’s degree in Computer Science 

  • A minimum of (3) years of related experience 

  • Familiarity with Security Technical Implementation Guides (STIGs) and vulnerability management processes 

  • Experience with maintaining LDAP and associated custom scripting for account validation and configuration management software (e.g., Ansible, Puppet) 

  • Cloud experience 

  • An Information Technology Infrastructure Library (ITIL) v3 Foundation Certification 


Clearance Requirements: 

  • Top Secret w/SCI 


Physical Requirements: 

  • Must be able to be in a stationary position more than 50% of the time 

  • Must be able to communicate, converse, and exchange information with peers and senior personnel 

  • Constantly operates a computer and other office productivity machinery, such as a computer 

  • 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 

  • The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.

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.