ManTech Principal Systems Engineer in Chantilly, Virginia

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

As Principal Systems Engineer you will be responsible for designing, implementing, and managing client operating environments and software, leveraging VMware Horizon Suite, in a distributed IT environment.

Responsibilities include but not limited to:

  • Engineering, documenting, delivering and maintaining secure physical and virtual desktop builds in accordance with customer specifications and security guidelines

  • Extensive experience in application virtualization, software packaging, automation scripting and across-the-wire enterprise system and application deployments

  • Diagnosing and resolving the toughest performance, security, and/or technical challenges related to desktop support and deployments

  • Writing implementation and design documents describing how security features are implemented

  • Participating in processes throughout all phases of ITIL Service Lifecycle to include developing Service Design Packages, Change Packages, SLAs, OLAs, test plans and Standard Operating Procedures

  • Providing IT Systems and Applications Engineering support for a large distributed IT infrastructure working within the Service Design division

  • Performing requirements analysis, design, and integration for complex software application environments and collaboration infrastructures.

  • Engineering solutions in accordance with customer requirements and providing technical guidance to less experienced systems engineers

  • Responsibility for investigating and resolving operational problems independently and in conjunction with other engineering and technical personnel

  • Providing IT Systems Engineering support on a wide range of technologies, including: VMware VDI Infrastructure, Symantec Management Platform, Microsoft Office, Adobe Acrobat, Client Web Browsers, Client Endpoint Security Suites, customer line-of-business applications, and others

  • Other tasks to include requirements specification, performance modeling, end-to-end functional analysis, cost estimation, and joint application design

  • Working on project teams responsible for engineering and packaging releases to integrate within the customer's production IT environment.

Position Requirements:

  • Requires Bachelor's degree and seven to nine years of related experience

  • Knowledge of current Windows Desktop and Server Operating Systems, Desktop and Application virtualization, Active Directory, Group Policy, PKI, Networking, SANs, and physical client endpoints

  • DoD 8570/8140 IAT Level 3 (CISSP, CASP or equivalent) certification required

  • Microsoft Certified Solutions Expert – MCSE (Windows 10 / Server 2012 products or later) desired

  • Enterprise Desktop and Application virtualization experience and certification in one or more of the following: VMware Horizon Suite (View / Mirage / AppVolumes / ThinApp), Microsoft (Hyper-V / App-V / RDS / RemoteApp / SCCM) desired

  • Capability to express project plans within Microsoft Project

Security Requirements: Top Secret required with SCI eligibility


Requires Bachelors degree (in Computer Science, Math, Electrical Engineering or related field) and seven to nine years of related experience.


Bachelor's Degree, See Qualifications

Years of Experience

07-09 years w/Bachelors Degree, See Qualifications

Position Type





ManTech International Corporation is comprised of approximately 7,300 talented employees who use advanced technology to help government and industry meet some of their greatest challenges 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. Nearly half our employees have a military background, and approximately 70 percent hold a government security clearance. As a leading provider of innovative technology services and solutions for the nation's defense, security, health, space, and intelligence communities; we hold nearly 1,100 active contracts with more than 50 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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