Senior Linux System Administrator Vice President

Citi • Irving, TX

1d

About The Position

We are seeking an accomplished and technically astute Level 3 Linux System Administrator to join our high-performance infrastructure team. This individual will serve as a subject matter expert (SME) on Linux systems, providing deep operational insight, advanced troubleshooting, performance tuning and capacity planning. Demonstrate a strong balance on hands-on expertise, automation mindset, and a strategic approach to system scalability, security, and lifecycle management.

Requirements

• 8+ years of progressive experience in Linux Server Administration with enterprise level skills in Physical and virtual environment management.
• Deep Understanding of Linux security methodologies, Hardening procedure and best practices.
• Deep Understanding of Linux Internals – Process Management, Memory handling. Kernel Tuning, Capacity planning.
• Evaluate and maintain server storage and other IT standards for the enterprise and all supporting products and services.
• Hands on Experience with automation tools (Ansible, Chef, Puppet)
• Analyze server and storage characteristics (e.g., CPU behavior latency transmission speeds packet loss and throughput) triage and troubleshoot problems.
• Knowledge and experience of Root Cause Analysis (RCA) required
• Familiarity with complex multi-site and global network design multi-layered switch environment firewalls VPN Load balancers and DNS
• Familiar with the fundamentals of web application and relational database architectures

Nice To Haves

• Knowledge and writing a code and script (Shell, Python. Perl, Yaml, and / or PHP) is a huge plus.
• Knowledge with analytics and observability tools (Grafana, Kibana, Elk, Splunk, AppDynamics) is a plus
• Experience with container technologies (docker, Kubernetes, openShift, AWS, GCP).

Responsibilities

• Deliver expert-level support and resolution for complex incidents and problems within the Linux ecosystem, ensuring minimal business impact and adherence to SLAs.
• Troubleshoot and resolve escalated issues in the Linux Environment.
• Proactively monitor system health, performance and capacity to ensure stability, availability and reliability.
• Perform Kernel Upgrade, patches and Vulnerability Management to ensure compliance meeting the organization standards.
• Design and enforce system hardening, access control, and security baselines aligned with the compliance framework.
• Server as escalation point and technical advisor for Level 1 and 2 administrators, develop technical runbooks and knowledge-based articles.
• Participate and lead initiatives for architectural reviews, infrastructure modernization, and enterprise risk assessments.
• Lead Major Incidents and engage with stake holders to perform Root Cause Analysis and provide permanent solutions.

Benefits

• In addition to salary, Citi’s offerings may also include, for eligible employees, discretionary and formulaic incentive and retention awards.
• Citi offers competitive employee benefits, including: medical, dental & vision coverage; 401(k); life, accident, and disability insurance; and wellness programs.
• Citi also offers paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays.
• For additional information regarding Citi employee benefits, please visit citibenefits.com.
• Available offerings may vary by jurisdiction, job level, and date of hire.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level