ManTech is seeking an experienced and detail-oriented Senior Systems Engineer with a strong background in Citrix and NetScaler technologies to join our team in Herndon, VA. The successful candidate will play a key role in designing, implementing, and maintaining enterprise-level systems that support critical applications and user environments.

Responsibilities to include but not limited to:

• Manage and optimize Citrix Virtual Apps and Desktops, ensuring high performance and availability.
• Configure, deploy, and maintain NetScaler appliances (SDX, MPX, VPX) and Citrix Gateway solutions, including GSLB.
• Monitor and troubleshoot user experiences and NetScaler operations.
• Collaborate with network teams to design and implement NetScaler solutions with VLANs, subnetting, and LACP.
• Automate workflows, develop NetScaler policies, and create custom HTML pages for enhanced functionality.
• Document system configurations and support upgrades to maintain operational excellence.

Basic Qualifications:

• 11+ years experience in Information Technology
• Experience with NetScaler appliances, including configuration, deployment, and management.
• Extensive hands-on experience with Citrix technologies such as Virtual Apps and Desktops (formerly XenApp/XenDesktop).
• Strong knowledge of load balancing, application delivery, and secure remote access using NetScaler.
• Experience monitoring and optimizing Citrix environments for performance and user experience.
• Familiarity with Citrix Workspace and related services.
• High School Diploma or GED.

Preferred Qualifications:

• Bachelor's or Master’s Degree in relevant Information Technology field or equivalent
• Proficiency with SDX, MPX, and VPX appliances.
• Experience architecting and designing Citrix Gateway solutions, including GSLB configurations.
• Advanced knowledge of NetScaler Console for monitoring, troubleshooting, and management.
• Proficiency in NetScaler policy creation, including responder and rewrite policies.
• Strong experience monitoring and troubleshooting XenDesktop user experiences in enterprise environments.
• Familiarity with Citrix Virtual Applications and Desktops on platforms such as Hyper-V, Nutanix, and VMware.
• Experience designing and installing NetScalers in collaboration with network teams.
• Advanced understanding of VLANs, subnetting, and LACP (Link Aggregation Control Protocol).
• Ability to create custom HTML pages to enhance user interfaces or workflows.
• Proficiency in scripting and automation for Citrix and NetScaler environments.
• Expertise in identifying and resolving Citrix-related issues to ensure optimal end-user performance.
• Familiarity with tools and strategies for enhancing user experiences in virtualized environments.

Security Clearance Required

• An active TS SCI with Polygraph

Physical Requirements:

• Use hands to operate a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.
• The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
• Constantly positions self to maintain computers in the lab, including under the desks and in the server closet