Systems Administrator - OMS

SAIC · Arlington

Team SAIC is currently seeking a motivated and experienced Organizational Messaging System (OMS) System Administrator to join our team at the Pentagon in Arlington, VA. This role is responsible for the daily operation, administration, monitoring, and maintenance of mission-critical defense and enterprise organizational messaging platforms. This role ensures secure, high-availability message routing across classified and unclassified government networks (including SIPRNET and TIPRNET).

The successful candidate will blend specialized messaging gateway expertise with core Windows systems administration, virtualization management, enterprise monitoring, and IT Service Management (ITSM) workflows within a high-tempo Network Operations Center (NOC) or Gateway Operations environment.

Responsibilities:

Administer, configure, and maintain enterprise organizational messaging platforms, such as Automated Message Handling System (AMHS), Enhanced Communications Gateway System (ECGS), SYNDEO Intelligent Gateway (SIG), Information Transport Systems (ITS), and Cross Domain Solutions (CDS).
Oversee high-volume, global message routing, queue processing, validation, and delivery across joint service endpoints, combatant commands, and external mission partners.
Manage Message Conversion Systems (MCS) and Communications Data Format Converters (CDC) to translate legacy tactical messaging protocols into modern organizational formats.
Monitor message queues to identify, isolate, and remediate message stalls, format errors, delivery delays, and routing table misconfigurations.
Maintain and secure physical and virtual server environments running Windows Server 2019 and 2022.
Perform core identity and directory administration, including Active Directory (AD), account provisioning, and role-based access control.
Coordinate hardware maintenance, volume allocation, disk space cleanups, cache clearings, and KVM/console connectivity.
Continuously monitor infrastructure and application health utilizing enterprise observability tools such as Microsoft System Center Operations Manager (SCOM).
Serve as a Tier II / Tier III technical escalation point for messaging and server-related incidents, handling escalations from Tier I operations desks.
Track, manage, and resolve tickets using enterprise ITSM platforms (e.g., ServiceNow).
Coordinate incident resolution and operational failover procedures with partner agencies, circuit providers (e.g., DISA), and watch commanders/Battle Captains.
Document system changes, standard operating procedures (SOPs), knowledge base articles, and incident root-cause analysis (RCA) reports.

SAIC® is a premier mission integrator focused on advancing the power of technology and innovation to serve and protect our world. Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives.

We are approximately 23,000 strong; driven by mission, united by purpose, and inspired by opportunities. SAIC is an Equal Opportunity Employer. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.3 billion. For more information, visit saic.com. For ongoing news, please visit our newsroom.

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