UNIX/Linux/Solaris Engineer

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., * 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.

Oracle Solaris,Red Hat Enterprise Linux (RHEL),ServiceNow IT Service Management (ITSM),Shell Scripting

Experience:

5 + years of related experience, * 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., * 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 and maintain Public Trust (onsite fingerprinting required)

• Growth: AI-powered career tools to map skills to learning and next roles.
• Support: A mobility team invested in your goals.
• Rewards: Benefits, wellness, 401(k) match, competitive pay, PTO.
• Community: Award-winning culture of innovation; military-friendly workplace.

The likely salary range for this position is $127,500 - $172,500. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.

Total Rewards at GDIT:

Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.

Our Identity Verification Process:

As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes.

We are GDIT. A global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development.

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