Senior Linux Systems Administrator

Senior Linux Administrator This position is a senior-level Linux administration role within a government agency, responsible for managing and securing Linux systems across on-premises and cloud environments. The role involves operating, maintaining, and implementing security measures for enterprise Linux servers, primarily RedHat and Ubuntu, in both standard and Azure government settings. Candidates are expected to possess deep technical expertise in Linux systems, cloud integration, automation, and security compliance to support critical infrastructure and regulatory requirements. Responsibilities Administer, configure, troubleshoot, and maintain RedHat and Ubuntu Server virtual machines and physical servers across production and non-production environments. Implement and uphold security hardening standards aligned with CIS benchmarks, utilizing tools such as Azure Defender for Cloud and Azure Policy. Manage system patching processes using Ubuntu Pro and APT, ensuring system stability and minimizing downtime through automated procedures. Develop and maintain automation scripts using Bash and PowerShell to streamline system operations across Linux and Azure platforms. Support Azure DevOps pipelines, source control, CI/CD workflows, and Docker deployments supporting Linux environments. Manage container workloads with Docker, including integration with Azure Key Vault for secrets management and vulnerability scanning via Azure Container Registry. Maintain identity and access management configurations, including SSSD, sudoers governance, and PAM settings, to secure Linux systems. Oversee storage and filesystem management, including LVM, XFS, and EXT4, ensuring proper partitioning and mount configurations following security best practices. Collaborate with cybersecurity teams to support audit activities, logging, and compliance reporting, leveraging audited and Azure-native security tools. Qualifications 8+ years of practical Linux administration experience within enterprise or government environments, with a focus on Ubuntu Server LTS releases. Proven experience working with Linux in Azure cloud environments, including networking, Azure Key Vault, and managed identity integration. Hands-on experience with Azure DevOps, pipelines, repositories, and CI/CD workflows involving Linux-based applications and containers. Proficiency in Docker, including secrets management, vulnerability scanning, and working outside of Kubernetes clusters. Advanced Bash scripting and working knowledge of PowerShell for cross-platform automation tasks. Solid understanding of security hardening techniques, such as SSH, UFW, AppArmor, systemd, and SSL/TLS certificate management. Ability to independently manage systems with minimal peer support, collaborating within interdisciplinary security and IT teams. Excellent problem-solving skills and the ability to adapt to fast-changing technical environments. Availability to work on-site full-time at the agency's Montgomery, Alabama office. Clearance to pass state and federal background checks for handling sensitive data. Publishing Pay Range: $55.00 -$65.00 USD Hourly This position is based in office and requires employee to work on-site. At GDH, we believe in the power of people and the importance of caring. Our culture statement, "We care about people," isn't just a tagline – it's the core of everything we do. GDH is a premier staffing and talent solutions company dedicated to helping businesses find the best talent and assisting job seekers in finding their dream jobs. GDH, founded in 2001, has grown into a leader in providing staffing solutions across various industries. We specialize in IT across several sectors, connecting top talent with leading enterprises. As a Best of Staffing firm recognized for excellence in client, employee, talent, and women's services, we pride ourselves on our commitment to quality and service. GDH offers a range of employee benefits that are designed to promote well-being and help maintain a healthy work-life balance. These comprehensive benefits cover various aspects of an employee's life and aim to enhance their overall experience with the company. Our health benefits include three medical insurance options with access to KISx Card, Zero Card, and HealthJoy concierge services. Other plan offerings include dental, vision, life, disability, supplemental insurance, and pet insurance plans. Enjoy additional perks like holiday pay, 401(k) plan, direct deposit, an employee referral program, work-life balance benefits, a Wellbeats membership, a discounted gym membership program, and more! For more detailed information on benefits, please go to GDH's website under the tab for candidates. GDH provides equal employment opportunities (EEO) to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, gender, sex (including pregnancy), sexual orientation, gender identity, national origin, age, disability, genetic information, marital status, ancestry, protected veteran status, military or uniformed service member status, or any other status or characteristic protected by applicable federal, state, and local laws. Applicants with disabilities who require an accommodation or assistance in applying and/or for interviewing, please contact our HR Department. Please visit our notice of collection for California applicants. GDH