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GDIT is seeking a UNIX/Linux/Solaris Engineer to support NIH CIT's HSS program. You will keep mission-critical systems stable, secure, and performant across Solaris (Zones/LDOMs) and Red Hat Linux on VMware, while applying careful, responsible automation to reduce toil-modernizing only where it strengthens reliability, security, and customer outcomes.

Location:Hybrid (3 days/week onsite, Bethesda, MD)

Responsibilities:

• Operate and administer Solaris and Red Hat estates: Solaris-administer Zones and Logical Domains (LDOMs); manage OS lifecycle, patching, and hardware (Oracle platforms such as T-series where applicable). Red Hat-administer RHEL systems virtualized on VMware (in partnership with the Windows/VMware team).

• Patching & change execution: Drive Solaris patching using Alternate Boot Environments (ABE)-build, patch, and reboot into ABEs on standard cycles (e.g., 3rd Friday for non-prod, 4th Friday for prod) with rapid rollback capability if needed.

• Adapt to Oracle's revised patch cadence (security bundles every ~6 weeks, with potential interim bundles) and plan out-of-band updates when required by vulnerability severity.

• Maintain Red Hat patching via Puppet, ensuring customer-managed servers also receive monthly OS updates.

• Automation & tool transitions: Lead the transition off Oracle Ops Center (EOL/waiver ends Dec 31) toward Ansible (preferred) or Puppet playbooks for Solaris patch automation; author playbooks/modules and operational runbooks for the new process.

• Support upgrade from Oracle OEM 13.5 to 24 AI and ensure monitoring/administration workflowsremainreliable during and after the migration.

• Monitoring & security operations: Configure and consume SL1 monitoring for OS/hardware health (CPU/memory/filesystems) and notifications; coordinate with DCOB (operations management) for platform configuration as needed.

• Triage security alerts from Tenable scans and follow-on tickets in Tripwire (file integrity) and Splunk (log-based anomalies such as SSH attempts); enforce host-level firewalls and raise network blocks when needed.

• Implement account policies (e.g., passwordexpirationchanges) safely across environments;validatechanges in non-prod first to avoid service impact.

• Service models & customer engagement: Solaris-own root and full OS/hardware administration; grantsudofor customer application operations. Red Hat-support bothmanaged (GDIT administers OS; customers manage apps) and customer-managed servers (customers hold root; GDIT ensures OS patching and provides consulting on request).

• Incident response & governance: Use ServiceNow for change and incident management; adhere to CAB approvals and standard change windows; deliver post-incident RCA where applicable.

• Participate inXMatterson-call rotations (15-minute acknowledge; tiered escalation), coordinating with NOC bridge during enterprise events (e.g., DNS or network issues).

• Documentation & collaboration:MaintainSharePoint-hosted SOPs/runbooks (with screenshots) covering patch orchestration (ABE), rollback, automation playbooks, OEM upgrade steps, SL1 alerting, and security/vulnerability remediation workflows; align with weekly UNIX-security syncs and customer meetings.

Required Qualifications:

• BS/BA or equivalent experience.

• 5+ years administering Oracle Solaris (Zones/LDOMs) and/or Red Hat Enterprise Linux at scale, including OS patching and change execution in regulated environments.

• Hands-on with ABE-based Solaris patching, rollback, and vendor bundle planning; experience adjusting to non-monthly patch cadences.

• Practical experience with Puppet and Ansible for UNIX automation (playbooks/modules), plus strong shell scripting (bash/ksh).

• Familiarity with VMware-hosted Linux operations and coordination with platform teams.

• Operational monitoring and security tooling: SL1, Tenable, Tripwire, Splunk; host-levelfirewallmanagement and security policy enforcement (e.g., password lifecycles).

• Proven use of ServiceNow (CAB/change templates; incident/RCA) and on-call processes viaXMatters.

• Strong documentation habits (SOPs/runbooks with screenshots) and collaborative posture with customers and cyber teams.

• Must be able to obtain andmaintaina Public Trust.

Preferred Qualifications:

• Designed Ansible-first automation to replace legacy tools (e.g., Oracle Ops Center) for Solaris patch management; integrated automation outputs with ServiceNow tasks/approvals.

• Experience upgrading Oracle OEM and validating monitoring/administration flows during cutover.

• Familiarity with CIS controls and practical hardening for UNIX/Linux (file integrity, SSH posture, logging,firewall).

• Capacity to coach customers on reliable application monitoring (SL1 hooks or customer tools like SiteScope) while keeping OS monitoring/alerting clean.

Clearance:Ability to obtain andmaintainPublic Trust (onsite fingerprintingrequired)

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