> Markdown version of [/jobs/ext/3449686-organizational-messaging-system-oms-system-administrator](https://www.wearedevelopers.com/jobs/ext/3449686-organizational-messaging-system-oms-system-administrator). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Organizational Messaging System (OMS) System Administrator - **Company:** Science Applications International Corporation - **Location:** Arlington, VA, United States (Remote available) - **Experience:** Experienced - **Salary:** $80,001.0 - $120,000.0 - **Contract:** Permanent contract - **Skills:** Multitier Architecture, Microsoft Windows, Active Directory, Cyber Security, Document Management Systems, Monitoring of Systems, Kernel-Based Virtual Machine, Enterprise Messaging Systems, System Center Operations Management, Microsoft Servers, Windows Servers, Queueing Systems, Role-Based Access Control, Secure Messaging, Server Virtualization, Computer Network Operations, Grafana, Information Technology, User Administration, Servicenow - **Published:** September 30, 2026 - **Apply:** https://www.dice.com/job-detail/95d88a9f-995f-45d7-98c8-812e82949fbc ## About the Role * Education: Bachelor's degree in Information Technology, Computer Science, Information Assurance, Cybersecurity, or related technical field. * Experience: 5+ years of systems administration experience, with at least 3 years dedicated to enterprise secure messaging gateways, defense communications, or mission-critical operations centers. * This position requires an active DOD Top Secret (TS) clearance. * Possess DoD 8570.01-M/DoD 8140 Certification IAW established mandate prior to start of work - IAT Level II required (CCNA Security, CySA+, GICSP, GSEC, Security+ CE, SSCP); IAT Level III is desirable (CASP+ CE, CCNP Security, CISA, CISSP (or Associate), GCED, GCIH). Applicants not meeting this requirement will not be considered. ## Description ?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., * 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. ## Related Videos - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Thinking Differently - How to Make Money from Cyber Attacks & Cheats](https://www.wearedevelopers.com/videos/745-thinking-differently-how-to-make-money-from-cyber-attacks-cheats) - [Applying Agile Principles to Incident Management ](https://www.wearedevelopers.com/videos/101-applying-agile-principles-to-incident-management) - [Monitoring as Code - Managing your dashboards at scale](https://www.wearedevelopers.com/videos/753-monitoring-as-code-managing-your-dashboards-at-scale) - [One Pipeline, Three Regulator - SBOM Compliance for the Developer](https://www.wearedevelopers.com/videos/100169-one-pipeline-three-regulator-sbom-compliance-for-the-developer) - [Better Together: Leveraging Your Observability Tools as a SIEM](https://www.wearedevelopers.com/videos/2118-better-together-leveraging-your-observability-tools-as-a-siem) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Walking Into The Era of Supply Chain Risks](https://www.wearedevelopers.com/magazine/106-walking-into-the-era-of-supply-chain-risks) - [Everything a Developer Needs to Know About MCP with Neo4j](https://www.wearedevelopers.com/magazine/604-everything-a-developer-needs-to-know-about-mcp-with-neo4j) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology)