Springfield, Virginia

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 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 Systems Engineer – VDI to join our team in Springfield, VA.

Responsibilities include, but are not limited to:

The Senior Systems Engineer – Virtual Desktop Infrastructure (VDI) serves as the Subject Matter Expert (SME) in the technologies, systems, applications, and services which make up the Activity’s IT Enterprise VDI solution. Specifically, the Senior Systems Engineer will be responsible for the designing, implementing, managing, maintaining, securing, and life-cycle management of the Citrix XenDesktop and NetScaler solutions deployed on multiple sets of enterprise-level IT systems in support of the Activity’s data center environments.

The Senior Systems Engineer directly supports the Activity’s Operations and Maintenance (O&M) teams in overseeing all VDI-based tasking of deployed operational Infrastructure Citrix solutions. This will include, but may not be limited to, all Guest Virtual Machine (VM) activities for the Cirtix XenDesktop applications (delivery controller, storefront direction, etc.), machine catalogs, delivery groups, Persistent and Non-Persistent images, and physical and virtual NetScaler models, to include NetScaler FIPS models. Desktop images will be regularly updated, tested, and deployed with both Operating System (OS) and third-party vendor application updates to maintain compliance, Information Assurance (IA), and Security (InfoSec) requirements.  

When VDI issues, incidents, and/or problems arise, the Senior Systems Engineer provides direct troubleshooting and problem resolution support, to include Root Cause Analysis (RCA). The Senior Systems Engineer also produces and maintains documentation of the VDI solution to include the system, sub-system, and components in the Activity’s IT Hosting portfolio, including as-built documentation, capacity/performance plans, and all other areas of system life-cycle planning.

The Senior Systems Engineer also works directly with the Activity’s IT Architecture and Engineering (A&E) team to consistently explore, investigate, research, analyze, assess, implement, and transition new technologies to an operational state to modernize and improve upon existing infrastructure solutions.

Basci Qualifications:

  • Shall have 7 or more years of progressive experience in a VDI systems engineering, or similar, role capturing requirements, designing, engineering, implementing, securing, and operating and maintaining enterprise-level VDI solutions for a globally dispersed IT enterprise.

  • Shall have 5 or more years of experience designing, engineering, implementing, and maintaining solutions in secure processing environments which must adhere to U.S. Government Information Assurance and Security standards such as the Defense Information Systems Agency (DISA) Security Technical Implementation Guides (STIGs).

  • Shall have 3 or more years of proven hands-on experience performing O&M of VDI solutions that are using the Citrix XenDesktop 7 suite and Citrix NetScaler 11, or newer, to provide enterprise-level virtual desktop and application offerings.

  • Demonstrated experience with utilizing, supporting, and maintaining Windows Server 2012 R2 and/or Windows Server 2016 operating system (OS) as a VDI server platform and Windows 7 and/or Windows 10 OS as a desktop platform in a VDI environment as part of an all-encompassing VDI solution.

  • Demonstrated experience implementing and supporting application virtualization through an assortment of technologies including Citrix XenApp, AppLayering, and/or Enterprise Layer Manager (ELM).

  • Demonstrated experience monitoring and assessing virtualization and storage infrastructure systems and solutions proactively for performance degradation and tuning and optimization opportunities.

  • Bachelor’s Degree from an Accredited University OR shall possess GIAC Security Essentials (GSEC) or Security+ Continuing Education (CE) or Systems Security Certified Practitioner (SSCP) to meet the minimum credential requirements for Cyber IT/Cybersecurity Workforce (CSWF) as outlined in SECNAV M-5239.2.

Preferred Qualifications:

  • Strongly desired to be Citrix Certified Professional – Virtualization (CPP-V) and CCP – Networking (CPP-N) certified.

  • Technical certifications in enterprise-level virtualization and OS vendor technologies, such as Microsoft, Nutanix, and/or VMware are also a plus.

  • Demonstrated experience operating and maintaining Citrix XenDesktop 7.15 Long-Term Service Release (LTSR) or newer.

  • Demonstrated experience operating and maintaining Citrix NetScaler 12.0 and later. Additionally, experience with supporting the unique nature of FIPS model NetScalers is also a plus.

  • Demonstrated experience in the O&M of Citrix Machine Creation Services (MCS) and/or Provisioning Services (PVS) for desktop servicing.

  • Demonstrated experience in leveraging vendor and industry product documentation, to include best practices, and software-based tools to research, engineer, build, and deploy right-sized and properly tuned and configured VDI desktops.

  • Demonstrated experience in implementing, configuring, securing, and maintaining NetScaler Firewalls, High Availability (Active-Active, Active-Passive), Load Balancers (to include Global Service Load Balancing (GSLB)), Logging, and Two-Factor Authentication through RADIUS integration.

  • Demonstrated experience utilizing, supporting, and maintaining Citrix monitoring products like Command Center, Director, Insight, and/or NetScaler Management and Analytics System (NMAS).

  • Demonstrated experience leveraging Microsoft PowerShell for the purposes of automating and orchestrating routine, as well as complex, administrative and operational tasking. Experience using Microsoft PowerShell to support Infrastructure as Code (IAC) and Configuration as Code (CAC) in a production enterprise environment is a plus.

  • Familiarity with proactively monitoring VDI implementations for performance degradation and tuning and optimization opportunities.

  • Familiarity with Public Key Infrastructure (PKI) and Secure Socket Layer (SSL) certificate generation, use, and upkeep as it pertains to Citrix-based solutions.

  • Familiarity with hyper-converged infrastructure (HCI) technologies, such as the Nutanix Enterprise Cloud Platform, and their capabilities to offer scalable converged compute and storage for enterprise-level virtual workloads. Prior experience using Nutanix ECP as the Hosting platform for VDI solutions is a plus.

  • Familiarity with basic Networking troubleshooting concepts and approaches.

Clearance Requirement: TS-SCI, Must be open to CI Poly

Physical Requirements:

  • Must be able to remain in a stationary position 50%.

  • Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.

  • Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.

  • Often positions self to maintain computers in the lab, including under the desks and in the server closet.

  • Frequently communicates with co-workers, management and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations.

  • May be asked to move Audio/Visual or Computer equipment.

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 http://www.mantech.com/careers/Pages/careers.aspx as a result of your disability. To request an accommodation please click careers@mantech.com and provide your name and contact information.

Springfield, Virginia

ManTech was founded in 1968 to provide advanced technological services to the United States government. We began with a single contract with the U.S. Navy to develop war-gaming models for the submarine community. Over the years, our government's technology needs have increased dramatically in scope and sophistication, and we have grown to meet that challenge.


For more than 4 decades, we kept a careful eye on where emerging technologies were taking the government, and we developed the resources to master those technologies—by staying close to our customers and anticipating their needs, hiring talented professionals to propel us into the future, and acquiring companies with proven capabilities.


Today, we are a multi-billion-dollar public company that provides the innovation, adaptability, and critical thinking our government needs for success in defense, intelligence, law enforcement, science, administration, health, and other fields—throughout the nation and in many countries throughout the world. We are now applying the lessons learned in the unforgiving arena of national security to help the private sector protect networks and critical information.

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