Title: Tier 3 System Administrator LeadLocation: On-site, Washington, DCWork authorization: Job SummaryWe are looking for a Tier 3 System Administrator Lead responsible for ensuring theoperational integrity, availability, and performance of enterprise server infrastructureacross on-premises, virtual, and cloud environments. Key Responsibilities Manage and support enterprise server environments (Windows & Linux) Ensure system availability, performance, and security compliance Troubleshoot and re