ManTech Senior 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 Senior Principal Systems Engineer, you will be responsible for designing, implementing, and managing platform services in a distributed virtualized environment.

Responsibilities include but not limited to:

•Leading a team of system engineers, responsible for establishing service baselines for Windows servers, desktops, zero/thin clients, and Linux servers

•Engineering, documenting, and providing software recommendations for services, including Active Directory, DNS, DHCP, and PKI, to support the virtualized environment

•Engineering, documenting, and providing software recommendations for e-mail services, including client and server configurations, e-mail backup, and fault tolerance, and scaling services to support user growth

•Engineering, documenting, and providing hardware recommendations for storage, compute, and networking components to support cloud environments

•Engineering, documenting, and providing recommendations for efficient management of the hardware, software, and services, supporting the virtualized environment, including the automation, cloud operations, and general movement towards Continuous Integration/Continuous Deployment (CI/CD) work streams

•Development of capacity management plans and implementing tools and techniques to implement the capacity management plan

•Experience in application virtualization, software packaging, automation scripting and across-the-wire enterprise system and application deployments is desired

•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

•Providing direction and guidance to less experienced systems engineers

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

•Providing IT Systems Engineering support on a wide range of technologies, including: Microsoft Exchange, Microsoft SharePoint, Microsoft Internet Information Services, Microsoft SQL Server, Service Now, Symantec Management Platform, Microsoft Office, Internet Explorer, Adobe Acrobat, InTrust, Lumension Endpoint Security, customer line-of-business applications, and others.

•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 or ten to twelve years of related experience. Knowledge of Server, Desktop and Application virtualization, networking, SANs, Microsoft Windows systems and desktop and thin client hardware.

CISSP or equivalent required (must be at least DoD 8570 IAT Level III certified)

•Microsoft Desktop certification (7.0 or later), Microsoft Server certification (2012 or later), or RedHat System Engineer (version 6 or later), or VMware Certified Professional (5.5 or later) required

•Enterprise virtualization experience with VMware certification (certifications beyond VCP preferred)

•Capability to express project plans within Microsoft Project and management team members to complete the plans

Security Requirements:

Top Secret clearance required with SCI eligibility

This position requires a privileged user account, therefore you are required to have/obtain certifications and maintain compliance IAW DoD Directive 8140.01, Cyberspace Workforce Management and DoD Directive 8570.01-M Information Assurance Workforce Improvement Program or any superseding directives or policy. If you do not currently meet this requirement you will be required to become compliant within 6 months of the start of employment. The specific level will be determined based on your position and required level of access.


Requires Bachelor s degree (in Computer Science, Math, Electrical Engineering or related field) or equivalent, and ten to twelve years of related experience.


Equivalent Experience/Education, Bachelor's Degree

Years of Experience

10-12 years w/Bachelors Degree, 07-09 years w/Masters Degree

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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