Senior Systems Administrator

Position Summary

Seeking an experienced Senior Systems Administrator to support mission-critical secure messaging and enterprise infrastructure environments. The role combines secure messaging gateway administration, Windows Server, Active Directory, virtualization, monitoring, incident management, and ITSM support.

Key Responsibilities

• Administer and troubleshoot enterprise messaging gateways, AMHS, ECGS, ITS, CDS, and message conversion systems.

• Monitor message queues, routing, delivery, and system performance across classified and unclassified networks.

• Administer Windows Server 2019/2022, Active Directory, virtualization, storage, and server infrastructure.

• Monitor systems using SCOM and resolve Tier II/III infrastructure and messaging incidents.

• Manage incidents, changes, and service requests through ServiceNow or similar ITSM platforms.

• Support failover, maintenance, troubleshooting, and operational continuity activities.

• Develop SOPs, technical documentation, knowledge articles, and RCA reports.

Required Qualifications

• Bachelor's degree in IT, Computer Science, Cybersecurity, or related field.

• 5+ years of systems administration experience, including 3+ years in secure messaging, defense communications, or mission-critical operations.

• Active DoD Top Secret (TS) clearance.

• DoD 8570/8140-compliant IAT Level II certification required, such as Security+ CE, CySA+, GSEC, GICSP, or SSCP.

Preferred Qualifications

• IAT Level III certification such as CISSP, CASP+ CE, CCNP Security, CISA, GCED, or GCIH.

• Experience with Windows Server, Active Directory, SCOM, ServiceNow, virtualization, secure messaging gateways, and classified environments.

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