Linux Production Support Analyst

The Linux Production Support Analyst The Linux Production Support Analyst sits within Citi's Security Infrastructure organization and is responsible for maintaining, certifying, and ensuring that Security Infrastructure and Security Applications remain in consistent adherence to MISP (Malware Information Sharing Platform) requirements as regulated by the OCC. This position plays a critical operational role in safeguarding enterprise security compliance by supporting production environments through continuous monitoring, troubleshooting, and vulnerability remediation. Responsibilities Maintain, certify, and ensure Citi's Security Infrastructure and Security Applications adhere consistently to MISP requirements. Support daily operations across existing infrastructure platforms and applications, including troubleshooting, monitoring, and remediation. Resolve infrastructure product and application escalations by collaborating with internal, highly technical teams. Query and research security logs using Splunk to support monitoring and incident investigation. Perform scripting in Bash/Shell to support automation and operational tasks. Maintain, track, and complete assigned tickets within the ticketing system queue in a timely manner. Resolve vulnerabilities and issues detected across applications and infrastructure environments. Analyze source code to identify and mitigate weaknesses and vulnerabilities within the system. Review and validate automated testing results, prioritizing corrective actions based on overall risk ranking. Scan and analyze applications using automated tools and perform manual testing when required. Apply working knowledge of networking protocols, security strategies, and application management to support troubleshooting efforts. Identify and implement opportunities to automate and standardize information security controls. Analyze root causes of issues, assess their impact, and implement required corrective actions to reduce risk. Coordinate with business and technical contacts to direct the development and delivery of secure solutions. Qualifications 4+ years of hands‑on experience working with Linux systems in a production environment. 3+ years of IT Security Production Support experience, specifically within Security Infrastructure or Security Application support. Proficiency in Bash/Shell scripting at a minimum; advanced scripting capability is a plus. Experience with Splunk Core or Splunk ES for querying and researching security and data logs. Strong ability to troubleshoot and support multiple applications across a security domain simultaneously. Good working knowledge of networking protocols, security strategies, and application management practices. Good understanding of Big Data or Data Lake platforms and environments. Experience with ticketing and project management tools such as Jira or ServiceNow. Excellent written and verbal communication skills, with the ability to clearly articulate issues and escalations to management. Strong process documentation skills and consistent adherence to domain processes and procedures. Ability to work effectively under pressure and manage time independently in alignment with project timelines. Education Bachelor's degree or equivalent work experience required. Linux certifications (e.g., Linux System Administrator) are a plus. Bilingual proficiency in Spanish is a plus. Benefits Competitive employee benefits, including medical, dental & vision coverage; 401(k); life, accident, and disability insurance; wellness programs; paid time off packages (planned vacation, unplanned sick leave, and paid holidays); and possible discretionary and formulaic incentive and retention awards for eligible employees. Citi is an equal‑opportunity employer. Qualified candidates will receive consideration regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other characteristic protected by law. #J-18808-Ljbffr Citigroup Inc.