Senior Systems Engineer (Citrix) - TS/SCI w CI Poly

Modern Government Solutions; Sterling (VA); On-site; USD 180,000 - 230,000; Full time

Job summary

Modern Government Solutions is seeking a Sr. Systems Engineer (Citrix) to design, deploy, and optimize a cloud-based Citrix VDI environment supporting national security missions. You will implement secure-by-default configurations, drive IaC practices, and maintain Linux and Windows infrastructure across a DevSecOps-driven Agile team.

You will collaborate with engineering and mission experts, prepare technical documentation, and present to government leadership. TS/SCI with CI Poly is required.

Qualifications

• Active DoD TS/SCI clearance with CI polygraph.
• Security+ CE and DoD 8140 compliance.
• STEM degree or equivalent experience accepted.
• 10+ years deploying and maintaining cloud platform infra.
• 5+ years with Citrix Virtual Apps and Desktops.
• Experience with VMware vSphere, Hyper‑V or Citrix Hypervisor.
• Proficiency with Citrix NetScaler/ADC.
• Windows Server admin and Active Directory.
• Cloud architecture and IaC/AaC experience.
• IdAM: AD, SAML, OpenLDAP, OAuth 2.0, OIDC.
• DevOps tools: Ansible, Terraform, Jenkins, GitLab.
• Container tech: Rancher and Kubernetes.

Responsibilities

• Design, deploy, and maintain CVAD in 100% cloud environment.
• Manage PVS/MCS, VDAs, hypervisors, and storage for VDI.
• Optimize VDI performance via monitoring and capacity planning.
• Configure Linux/Windows cloud infrastructure as IaC/AaC.
• Set up IdAM resources and AD/LDAP services.
• Troubleshoot complex issues across VDI and infra stack.
• Develop test plans; document architectures and procedures.
• Collaborate with engineering and end-users on interfaces.
• Work in a DevSecOps Agile team; present to leadership.

Skills

Citrix Virtual Apps and Desktops

Security clearance TS/SCI

DevSecOps

IaC

Terraform

Ansible

Jenkins

GitLab

Kubernetes

VMware vSphere

Active Directory

Windows Server

Citrix NetScaler/ADC

FSLogix

PVS/MCS

Education

Bachelor's or Master's degree in a STEM field

Experience may be acceptable in lieu of a degree

Tools

Citrix Provisioning Services (PVS)

Machine Creation Services (MCS)

Citrix NetScaler/ADC

Terraform

Ansible

Jenkins

GitLab

Kubernetes

Grafana

Splunk

Job description

Title: Sr. Systems Engineer (Citrix)

Location: Sterling, VA (Relocation assistance considered)

Clearance required: Active TS/SCI with CI Polygraph

Employment type: Full-Time, Onsite

Multiple positions available

Position Summary

MGS is seeking a Sr. Systems Engineer (Citrix) to lead the design, deployment, and optimization of an enterprise Citrix Virtual Desktop Infrastructure (VDI) environment within a secure, cloud-native platform supporting national security missions. In this role, you will deliver scalable, high-performance virtual desktop solutions while maintaining Linux and Windows cloud-based infrastructure, COTS applications, and enterprise computing services across a DevSecOps-driven Agile environment. Working alongside engineering, cybersecurity, and mission experts, you will implement secure-by-default configurations, drive Infrastructure as Code (IaC) practices, and keep critical environments running at the highest level.

Responsibilities (not limited to):

• Design, deploy, and maintain Citrix Virtual Apps and Desktops (CVAD) infrastructure in a 100% cloud environment, including Delivery Controllers, StoreFront, NetScaler/ADC, and supporting components.
• Implement and manage Citrix Provisioning Services (PVS) or Machine Creation Services (MCS) for desktop image management; manage Virtual Delivery Agents (VDAs), hypervisors, and storage systems.
• Optimize VDI performance through monitoring, capacity planning, and resource allocation; configure and manage user profiles using FSLogix.
• Deploy, configure, and maintain Linux and Windows cloud-based infrastructure, COTS applications, and enterprise computing services as IaC and AaC.
• Configure IdAM, Active Directory, and LDAP resources with platform applications.
• Troubleshoot complex technical issues across the VDI and infrastructure stack using log file analysis and root-cause analysis.
• Develop and execute comprehensive test plans; prepare and maintain technical documentation including user guides, infrastructure diagrams, and operational procedures.
• Collaborate with engineering teams and end-users to design and maintain application interfaces and platform solutions.
• Develop within an Agile scrum team following DevSecOps principles and configuration management standards.
• Prepare technical presentations for government and senior leadership.

Required Skills and Qualifications

• Must possess an active DoD TS/SCI security clearance with CI Polygraph.
• Must meet DoD 8140 requirements, including Security+ CE certification.
• Bachelor's or master's degree in a STEM field. Experience may be acceptable in lieu of a degree.
• 10+ years of experience deploying and maintaining platform infrastructure and COTS applications in cloud-based environments.
• 5+ years of hands‑on experience with Citrix Virtual Apps and Desktops, including expert knowledge of Citrix architecture, components, and deployment methodologies.
• Experience with hypervisor platforms including VMware vSphere, Microsoft Hyper‑V, or Citrix Hypervisor.
• Proficiency with Citrix NetScaler/ADC configuration and management.
• Strong experience with Windows Server administration and Active Directory.
• Experience with cloud architecture, system design, and enterprise workflow or automation platform integration.
• Experience supporting IdAM technologies including Active Directory, SAML, OpenLDAP, OAuth 2.0, and OIDC.
• Experience with DevOps tooling including Ansible, Terraform, Jenkins, and GitLab.
• Familiarity with containerized development environments including Rancher and Kubernetes.

Desired Skills and Qualifications

• Citrix Certified Professional, Virtualization (CCP-V) or higher.
• Experience with Model‑Based Systems Engineering (MBSE) environments and tools.
• Experience optimizing cloud‑hosted solutions and supporting Azure or similar environments.
• Experience configuring and instrumenting monitoring and visualization tools such as Grafana and Splunk.
• Experience implementing and integrating ServiceNow solutions.
• Familiarity with customer security requirements and processes within classified environments.
• Experience supporting virtualization technologies and application streaming or layering techniques.
• Experience leading from a total system perspective across cloud services, infrastructure, and security domains.
• Experience integrating complex systems using APIs, message queues, and ETL pipelines.

*Applicants selected will be United States citizens and may be subject to a government security investigation for access to classified information.*

About us

At MGS, we believe a people‑first culture corresponds to organizational success through a commitment to excellence, integrity, inclusion, and an attitude that welcomes challenges meets demands, sustains growth, and drives innovation. We provide expert mission‑first technical and programmatic services and solutions for the US intelligence community, the US Department of Defense, and other governmental agencies. We create people‑first organizational cultures where employees feel needed in the system, not a system that needs employees. We provide you with long‑term career opportunities centrally focused on our core value system: inclusion, integrity, and a commitment to excellence.

MGS is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status, and will not be discriminated against on the basis of disability.