Citi · 14 hours ago
Senior Linux System Administrator Vice President
Irving Texas United States
Full-time
Hybrid
Senior Level, Lead/Staff
$126K/yr - $189K/yr
8+ years expCiti is a leading global bank, and they are seeking an accomplished Level 3 Linux System Administrator to join their high-performance infrastructure team. This role involves providing expert support for Linux systems, ensuring operational excellence, and leading initiatives for system security and scalability.
BankingFinanceFinancial Services
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
Qualification
Required
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 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)
Bachelor's/University degree in Computer Science/Engineering preferred or equivalent experience
Benefits
Medical, dental & vision coverage
401(k)
Life, accident, and disability insurance
Wellness programs
Paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays
Company
Citi
Citi's mission is to serve as a trusted partner to our clients by responsibly providing financial services that enable growth and economic progress.
10001+ employees
H1B Sponsorship
Citi has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1386)
2024 (849)
2023 (1375)
2022 (1117)
2021 (876)
2020 (901)
Funding
Current Stage
Late StageLeadership Team
James Monahan
Managing Director / Global Head of Asset Servicing
Naveed Sultan
Managing Director, Chairman, Institutional Clients Group
Recent News
2026-01-20
2026-01-15
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