Senior Systems Administrator (ECGS Application)

About SHR Consulting Group SHR Consulting Group, LLC is a small business delivering enterprise IT, cybersecurity, and program management services to the Department of Defense and federal civilian agencies. We support mission-critical infrastructure at the Pentagon and across the National Capital Region, and we invest in our people through competitive compensation, professional certification support, and long-term career growth on stable, multi-year programs. Position Summary SHR Consulting Group is seeking an experienced Senior Systems Administrator to support a mission-critical ECGS environment serving DoD and National Gateway customers. This position is responsible for the administration, configuration, monitoring, troubleshooting, and maintenance of ECGS applications and supporting infrastructure, including Service Desk, RI Router, Data Secure Transport (DST), Mailroom Profile libraries, Message Center, Windows Server, SQL Server, and IIS. The Systems Administrator will monitor system and network performance, analyze message routing and transmission issues, troubleshoot distributed applications, and execute manual failover procedures between cluster nodes to maintain operational continuity. The role also supports OS hardening, security patching, IAVA/STIG compliance, configuration management, and technical documentation in a secure DoD environment. The ideal candidate brings strong systems administration and troubleshooting skills, specialized ECGS experience, and the ability to rapidly resolve complex messaging and communications issues in a mission-critical operational environment. This position is full-time onsite at the Pentagon and requires an active DoD Clearance. Key Responsibilities: Operate and administer the Enterprise Communications Gateway System application suite, ensuring high-availability performance across both large and small-scale ECGS configurations. Configure and maintain the ECGS/Mailroom Profile libraries and Message Center folders, including the design and deployment of custom profiles to support advanced message filtering and distribution rules. Manage, configure, and troubleshoot ECGS tools and subsystems including Service Desk, RI Router, and DST (Data Secure Transport) configurations. Administer and troubleshoot backend systems supporting the ECGS environment, specifically Microsoft SQL Server databases and Microsoft Internet Information Services (IIS) web servers. Monitor, diagnose, and maintain hardware-to-software configurations, including Protogate Communications serial-to-network subcomponents. Provide real-time monitoring of host Windows Operating Systems, local and remote distributed applications, and vital network connections. Perform message routing analysis to proactively identify, troubleshoot, and resolve delivery failures, queue bottlenecks, and routing table issues. Execute manual failover procedures between local Cluster site ECGS applications and alternate site cluster nodes in…