Senior Systems Administrator (Remote App)

We are seeking an experienced Senior Systems Administrator - Remote Applications to design, manage, and optimize enterprise remote application and virtual access platforms. The ideal candidate has deep expertise in Microsoft RDS, Citrix, VDI, and application virtualization technologies, with a strong focus on performance, security, and highavailability for distributed workforces.

Key Responsibilities

Remote Application Platform Engineering

Design, administer, and support enterprise remote application platforms (RDS, Citrix Virtual Apps and Desktops, VDI, application virtualization).
• Manage RDS farms, session hosts, brokers, gateways, and licensing servers.
• Administer Citrix delivery controllers, StoreFront, Workspace, and supporting components.
• Lead platform upgrades, migrations, and architecture enhancements.

Performance, Scalability & High Availability

• Optimize performance, resource utilization, and user experience across remote environments.
• Implement and maintain load balancing, redundancy, and failover strategies.
• Monitor platform health and proactively address performance bottlenecks.

Security & Access Controls

• Collaborate with security teams to implement secure remote access controls and baselines.
• Manage SSL certificates, secure gateway configurations, and encryption settings.
• Apply Group Policy, hardening standards, and configuration baselines for session hosts.

Troubleshooting & Advanced Support

• Diagnose and resolve complex session, profile, and application delivery issues.
• Manage user profiles (roaming profiles, FSLogix, UPM) and application settings.
• Serve as an escalation point for remote access and virtual application issues.

Operations, Lifecycle & Documentation

• Support patching, updates, and lifecycle management of remote application platforms.
• Maintain documentation, runbooks, and operational standards.
• Coordinate with networking teams on firewall rules, DNS, load balancing, and connectivity requirements.

Required Qualifications

• Bachelor's degree in information technology or related field, and 8 years of experience. 4 years of additional experience may be substituted in lieu of a degree.
• 7 years of systems administration experience with a strong focus on remote access technologies.
• Expertlevel experience with Microsoft RDS and/or Citrix Virtual Apps and Desktops.
• Strong Windows Server and Active Directory experience.
• Experience with profile management and application virtualization technologies.
• Familiarity with networking concepts related to remote access (DNS, load balancing, firewalls).
• Proficiency in scripting and automation (PowerShell).
• DoD 8140 IAT Level II certification (e.g., Security+).
• Active TS/SCI clearance.

Preferred Qualifications

• Experience with Azure Virtual Desktop (AVD) or cloudhosted VDI solutions.
• Experience with VMware Horizon or similar platforms.
• Knowledge of MFA, conditional access, zero trust, and secure remote access models.
• Relevant certifications (Microsoft, Citrix, VMware)

Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world's leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can't be done by solving the most daunting challenges facing our customers. Visit peraton.com to learn how we're keeping people around the world safe and secure.