Senior Principal System Engineer - 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

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

Currently, ManTech is seeking a motivated, career and customer-oriented Senior Principal System Engineer to join our team in Chantilly, VA.

Responsibilities include, but are not limited to:

  • Support the engineering and development of LAN/WAN-based and remote user solutions, upgrades, and additions.

  • Travel to sites and perform logistical activities to include site surveys, hardware/software install, remove hardware, check hardware for shipment, etc.

  • Work alongside of Deployment Engineer to develop project schedules for tracking customer deployments.

  • Work with external vendors and internal procurement team to obtain required materials as well as support budget analysis.

  • Provide SME input to the customer and PM in support of project.

  • Integrate systems with Windows and Linux as it applies to core service dependencies

  • Design, deployment, testing, certification, patching, addressing interoperability issues of all VMware components to include the hypervisor, vSphere, NSX, vRealize Suite, and Site Recovery Manager

  • Assure continuity of design features from concept to implementation. 

  • Research new technologies for possible inclusion into the reference architecture that includes leading an analysis of alternatives, developing use cases, and presenting findings.

  • Work closely with security professionals to achieve and maintain security requirements.

  • Ensure system design is properly documented and assist with technology transfer of the solution to the implementers.

  • Demonstrate the ability to make decisions independently, resolve important questions, plan, and coordinate work.

  • Support technology evaluations, participation at meetings, coordination with related Government and performer organizations, program planning, background research, meeting preparation, and presentation production.

  • Provide inputs to the PM, assisting in responses to internal/external inquiries related to the project.

  • Act as the SME in areas that are not primarily within their technical domain but are pertinent to the new concepts/initiatives the project may be pursuing.

  • Participate in technical reviews of these activities and assist with technical evaluation and independent assessments of the concepts and related technologies.

  • Prepare briefings, reports, and other related documentation/data to support the development and approval of these activities. 

Basic Qualifications:

  • B.S. Degree or higher in Computer Science or similar Engineering discipline

  • 10+ years for experience

  • Extensive experience with MS Office, Project, Excel, Word, Visio, and PowerPoint  

  • Strong written and oral communication skills, detail oriented, strong organizational skills

  • Proven ability to multi-task and prioritize responsibilities

  • Excellent attention to details and diligent adherence to deadlines and deliverables

  • A high-level performer with the ability to be proactive and respond rapidly to changing conditions in a fast-paced environment

  • Strong Expertise with NSX / VMware and SolarWinds will be highly desired / relevant

  • Must possess DoD 8570 IAT-II certification

Security Clearance Requirements:

  • TS/SCI adjudicated in last 6 years. Willingness to submit for CI Polygraph.

Physical Requirements:

  • Must be able to remain in a stationary position up to 75% of the time

  • Must be able to move about inside the office to access file cabinets, office machinery

  • Must be able to position self to maintain office supplies on variable height shelving.

  • 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

  • Must be able to observe and detect employee deviations from established policy

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.