Senior Linux System Administrator Vice President

Job Overview

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.

• 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.
• Serve 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 stakeholders to perform Root Cause Analysis and provide permanent solutions.

• 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.
• Knowledge of scripting and programming (Shell, Python, Perl, YAML, and/or PHP) is a plus.
• Knowledge with analytics and observability tools (Grafana, Kibana, ELK, Splunk, App Dynamics) is a plus.
• Experience with container technologies (Docker, Kubernetes, Open Shift, AWS, GCP).

• Bachelor's/University degree in Computer Science/Engineering preferred or equivalent experience.

Time Type:
Full time
Primary

Location:

Irving, Texas, United States

Salary Range: $ - $

Equal opportunity employer statement:
Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. For accessibility or post-application accommodations, please review Citi’s Accessibility resources and policies.