Senior Linux Administrator

DDC is seeking a Senior Linux Administrator to support a mission-critical federal financial systems environment running on enterprise Linux. This role is responsible for maintaining and improving the performance, security, reliability, and availability of Linux servers supporting Oracle-based financial applications and databases across production and non-production environments. The Senior Linux Administrator will lead efforts in system hardening, patching, automation, monitoring, troubleshooting, and backup/recovery, and will provide technical support for migrating Linux-based systems from on-premises infrastructure to AWS, including the use of Infrastructure as Code and modern automation practices.*This position is contingent upon contract award.*Responsibilities:Manage complex, enterprise Linux environments with focus on performance, stability, security, and automation.Install, configure, and maintain physical and virtual Linux servers and operating systems.Provide Linux administration support for Oracle Federal Financials environment, database, and mid-tier administration to ensure confidentiality, integrity, and availability (targeting 99.5%+ availability).Perform patch management, vulnerability management, baseline configuration, and OS hardening.Monitor systems for performance and availability, respond to alerts/outages, and support troubleshooting to resolution.Develop and maintain automation using scripts (Bash/Python/Perl) and tools such as Ansible/Puppet/Chef.Support backup/recovery and storage management for Linux OS environments (instance creation/modification as needed).Support AWS migration of Linux-based systems from on-prem to AWS.Support configuration/deployment of AWS compute, storage, and networking services.Design and implement Infrastructure as Code (IaC) to automate provisioning/configuration of AWS infrastructure; implement automation pipelines for deployment/updates.Coordinate with development/application teams to support CI/CD pipelines, deployments, and integrations.Maintain documentation of processes/configurations and assist in documenting undocumented processes.Perform other duties as required.Qualifications:Senior-level experience administering enterprise Linux environments (physical and virtual). (Minimum 10 years of experience.)Strong experience with automation and configuration management (e.g., Ansible, Puppet, Chef) and scripting (Bash, Python, etc.).Experience supporting cloud migration to AWS and working with AWS infrastructure services.Experience with monitoring, capacity planning, troubleshooting, patching, and security hardening in regulated environments.Ability to support environments subject to federal security requirements (e.g., NIST/FIPS-aligned practices) and participate in audit/security support activities as needed.Strong documentation and communication skills; able to work with government and contractor teams in a hybrid environment.Education Level: Bachelor’s degree in Information Systems, Business Administration, Program Management, Finance, Computer Science, or related field preferred. Master’s degree preferred. Equivalent relevant experience may be considered.Clearance Requirements: Must be able to obtain and maintain SBA suitability/Public Trust, PIV access, and access to SBA systems as required.Certification Requirements: AWS certifications are preferred but not mandatoryTravel will be required to Washington, DC as needed.About UsDiné Development Corporation (DDC) is a Navajo Nation–owned family of companies that provides government agencies and commercial organizations with high-quality IT, professional, environmental, and research and development services. DDC is dedicated to empowering the Navajo Nation and the communities we serve.BenefitsEligible full-time employees receive a comprehensive benefits package, including medical, dental, vision, life and disability coverage, retirement savings with company match, and paid time off. Additional benefits include voluntary supplemental benefits, access to an employee assistance program, and educational assistance with tuition reimbursement.Equal Opportunity & Compliance StatementThis contractor and subcontractor shall abide by the requirements of 41 CFR 60-1.4(a), 60-300.5(a), and 60-741.5(a). These regulations prohibit discrimination against qualified individuals based on their status as protected veterans or individuals with disabilities, and prohibit discrimination against all individuals based on their race, color, religion, sex, sexual orientation, gender identity, national origin, or for inquiring about, discussing, or disclosing information about compensation, or any other basis prohibited by law. We participate in E-Verify.DDC is committed to providing equal employment opportunities to all applicants and employees. 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