Lead Infrastructure Engineer

Lead Infrastructure Engineer – On-Premise Systems & DevOps Citi is looking for a Lead Infrastructure Engineer to take ownership of the on-premise infrastructure underpinning critical financial applications within the Global Functions Technology (GFT) Accounting, Controls and Ledger organization. In this role, you will architect and sustain highly available, secure, and performant systems that directly support mission-critical operations at a global financial institution. You will combine deep technical expertise with team leadership, risk oversight, and a forward-looking approach to automation and observability. Responsibilities Design, build, and maintain highly available, secure on-premise Linux environments that support mission-critical financial applications across the Accounting, Controls and Ledger technology organization. Lead the full application infrastructure lifecycle (Design, Procure, Build & Handover to App Support) — ensuring reliable and controlled delivery across all environments. Architect and administer enterprise storage solutions including NAS, SAN, ScaleIO, and S3 object storage, implementing access controls through Active Directory groups to enforce security and governance. Engineer resilient middleware environments on platforms such as Tomcat and WebSphere, leading performance tuning, capacity planning, and high-availability configuration for production systems. Design and validate comprehensive disaster recovery plans that meet defined RTO/RPO objectives, and build monitoring and observability solutions using tools such as AppDynamics to enable proactive issue detection. Install, configure, and maintain Ab Initio server infrastructure, and support database environments by writing and optimizing SQL queries to ensure data integrity and system performance. Manage the complete lifecycle of digital certificates, conduct impact assessments for infrastructure and SaaS maintenance activities, and collaborate with application teams to resolve vulnerabilities and security configuration issues. Leverage GenAI tools such as GitHub Copilot and AI-powered platforms to accelerate the creation of automation scripts in Bash and Python, generate Infrastructure as Code using Ansible, and automate log analysis for faster troubleshooting. Mentor junior and mid-level engineers on technical practices and operational standards, lead root cause analysis for complex incidents, and maintain clear documentation for all system configurations and procedures. Required Qualifications & Skills 6+ years of experience in infrastructure engineering, systems administration, or a closely related DevOps discipline. Expert-level Linux server administration, including installation, configuration, hardening, and ongoing operational management of production environments. Hands-on experience installing and configuring Ab Initio server software, with a solid understanding of how it integrates within an on-premise infrastructure stack. Proficiency in SQL, including writing queries, performance tuning, and query optimization across relational database environments. Strong scripting capability in Unix shell, Bash, or Python, applied to infrastructure automation, application logic, and operational workflows. Deep experience with enterprise storage technologies (NAS, SAN, ScaleIO, S3) and application server platforms such as Tomcat or WebSphere. Demonstrated ability to design and execute disaster recovery and business continuity plans, with working knowledge of SFTP and NDM (Connect:Direct) secure file transfer protocols. Familiarity with vulnerability management, server hardening, certificate lifecycle management, Active Directory, and ServiceNow for incident and change management. Bachelor's degree or equivalent professional experience in a relevant technical field. Beneficial Skills & Qualifications Experience working with GenAI-assisted development tools such as GitHub Copilot or AI-powered observability platforms to improve infrastructure automation and accelerate troubleshooting. Working knowledge of application performance monitoring tools such as AppDynamics, Grafana, Dynatrace, or Google Cloud Observability. Good understanding of virtualization and cloud environments, including VMware or Hyper-V. Familiarity with networking fundamentals as they relate to on-premise infrastructure design and connectivity. Master's degree in a technology or engineering discipline preferred or equivalent experience What We Offer Joining Citi means working on infrastructure that sits at the heart of global financial operations, alongside a team that values technical rigor, collaboration, and continuous improvement. You will have the scope to make a genuine impact — leading complex systems, shaping engineering practices, and growing your career within one of the world's leading financial institutions. A hybrid working model with 3 days in the office and 2 days working remotely, giving you structure alongside flexibility. Ownership of high-impact infrastructure that supports critical financial systems operating at global scale. Opportunities to lead and mentor a team of engineers, building your leadership capability alongside your technical depth. Access to learning and development resources that support both technical advancement and professional growth. Exposure to emerging technologies including GenAI tooling and modern Infrastructure as Code practices, keeping your skills at the forefront of the industry. Competitive compensation and a comprehensive benefits package designed to support your financial wellbeing and long-term security. Wellbeing and family support program that recognize the importance of balance alongside performance. Apply now to bring your infrastructure engineering expertise to a role where your work directly supports the integrity and resilience of Citi's global financial technology platform. ------------------------------------------------------ Job Family Group: Technology ------------------------------------------------------ Job Family: Applications Development ------------------------------------------------------ Time Type: Full time ------------------------------------------------------ Primary Location: Irving Texas United States ------------------------------------------------------ Primary Location Full Time Salary Range: $125,760.00 - $188,640.00 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 . Available offerings may vary by jurisdiction, job level, and date of hire. ------------------------------------------------------ Most Relevant Skills Please see the requirements listed above. ------------------------------------------------------ Other Relevant Skills For complementary skills, please see above and/or contact the recruiter. ------------------------------------------------------ Anticipated Posting Close Date: Sep 11, 2026 ------------------------------------------------------ Automated Processing and AI We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi. Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details. Illinois residents – AI Notice and Right ------------------------------------------------------ Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi . View Citi’s EEO Policy Statement and the Know Your Rights poster.