Systems Administrator VMware & ArcGIS Enterprise

Position Overview: We are seeking a highly skilled Systems Administrator to manage and support a secure, air-gapped virtualized environment running VMware ESXi and ArcGIS Enterprise 12.1. This role combines infrastructure management, enterprise GIS administration, and general IT operations to ensure the reliability, performance, and security of a multi-server ArcGIS deployment. Key Responsibilities: VMware / Virtual Infrastructure Administration: - Manage and maintain VMware vSphere environment, including ESXi hosts and vCenter Server Appliance (VCSA) - Provision, configure, and optimize virtual machines across multiple physical hosts - Monitor system performance, resource utilization (CPU, RAM, GPU), and storage - Perform VM lifecycle management (deployment, snapshots, backups, cloning) - Troubleshoot virtualization, networking, and hardware-related issues - Ensure high availability and system resiliency within an offline environment ArcGIS Enterprise Administration: - Administer ArcGIS Enterprise 12.1 deployment (Portal, Server, Image Server, Web Adaptors, Notebook Server) - Manage site configurations, federation, and security - Publish and maintain GIS services, web maps, and applications - Monitor system health, logs, and performance - Perform upgrades, patches, and backups - Troubleshoot service failures and performance issues - Support ArcGIS Pro users and licensing Database & Data Management: - Administer Microsoft SQL Server 2019 - Manage geodatabases, backups, and data integrity - Optimize database performance for GIS workloads IT Systems & Network Administration: - Maintain Windows Server 2025 systems - Configure IIS, DNS, and internal networking - Implement security policies in an air-gapped environment - Perform system patching and updates (offline) - Manage user accounts and access controls - Maintain system documentation Hardware & GPU Resource Management: - Support NVIDIA L40 GPU environments - Allocate GPU resources for

ArcGIS Pro VMs - Monitor GIS workload performance Required Qualifications: - Bachelors degree in IT, GIS, Computer Science, or related field (or equivalent experience) - Security+ or greater certification - 5+ years of systems administration experience - Strong VMware vSphere / ESXi experience - Has or is able to obtain a TS/SCI - ArcGIS Enterprise administration experience - Windows Server administration knowledge - SQL Server experience - IIS/web server knowledge Preferred Qualifications: - Experience in air-gapped environments - Familiarity with ArcGIS Pro workflows - GPU virtualization experience - Scripting (PowerShell, Python) - Backup and disaster recovery knowledge Key Skills: - Problem-solving and analytical thinking - Strong communication and documentation - Ability to work independently - Attention to detail Work Environment: - Able to work in a secure space - Fully disconnected (air-gapped) infrastructure - VMware-based virtualized ecosystem - Multi-server ArcGIS Enterprise deployment - GPU-accelerated compute environment GDIT IS YOUR PLACEAt GDIT, the mission is our purpose, and our people are at the center of everything we do. Growth: AI-powered career tool that identifies career steps and learning opportunities Support: An internal mobility team focused on helping you achieve your career goals Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off Community: Award-winning culture of innovation and a military-friendly workplaceOWN YOUR OPPORTUNITYExplore an enterprise IT career at GDIT and youll find endless opportunities to grow alongside colleagues who share your desire to drive operations forward.