Head of Availability Systems Engineering

Job Overview

As a Head of High Availability Systems Engineering, you will own the strategy, stability, and evolution of a large‑scale z/TPF, Stratus, and I‑Series estate that underpins enterprise‑grade operations around the clock.

• Lead, mentor, and grow a high‑performing global team of z/TPF, Stratus, and I‑Series Systems Programmers
• Foster a culture of engineering excellence, continuous learning, and accountability across geographically distributed teams
• Set clear performance expectations and develop career pathways for senior technical contributors

• Oversee the installation, configuration, maintenance, and upgrades of z/TPF, Stratus, and I‑Series software environments
• Drive end‑to‑end lifecycle management of complex, large‑scale HA infrastructure — from hardware components to operating systems and related software
• Administer and optimize the IBM Security Portal, ensuring robust vulnerability management practices are embedded across the estate

• Proactively monitor system performance, identify bottlenecks, and architect solutions that maximize throughput and reliability
• Lead capacity planning initiatives, translating business growth projections into actionable infrastructure roadmaps
• Implement performance tuning strategies across z/TPF, VOS, and IOS environments

• Champion comprehensive security policies and procedures that protect sensitive data and preserve system integrity
• Maintain deep familiarity with mainframe security tooling, including Crypto, FICON, and platform‑specific security utilities
• Ensure compliance with enterprise security standards and regulatory requirements

• Architect and maintain enterprise‑grade disaster recovery solutions, with expert‑level command of storage replication technologies
• Lead continuity‑of‑business planning, testing, and execution to ensure zero‑compromise availability for critical systems

• Partner closely with application support, database administration, and network engineering teams to deliver integrated, resilient solutions
• Identify and implement process improvements that drive operational efficiency, reduce toil, and elevate engineering standards
• Maintain rigorous, up‑to‑date documentation of system configurations, runbooks, and troubleshooting procedures

• Deep, hands‑on expertise in z/TPF Administration, including system programming, tuning, and troubleshooting at enterprise scale
• Proficiency with Stratus VOS and I‑Series IOS operating systems and associated toolsets
• Strong working knowledge of mainframe hardware and software ecosystems, including Crypto, FICON, and platform utilities
• Demonstrated experience with IBM Security Portal and enterprise vulnerability management frameworks
• Expert‑level understanding of disaster recovery architectures and storage replication technologies

• Proven track record of leading and scaling global, senior‑level engineering teams in high‑stakes environments
• Exceptional analytical and problem‑solving capabilities — able to diagnose and resolve complex, multi‑layered system failures under pressure
• Outstanding communication and stakeholder management skills, with the ability to translate technical complexity for executive audiences
• Strategic thinker who balances long‑term platform vision with day‑to‑day operational excellence
• Collaborative leader who builds trust across organizational boundaries and drives alignment across diverse IT disciplines

• 15+ years of overall experience in systems engineering or infrastructure roles
• Minimum 8 years of hands‑on z/TPF Administration experience in large‑scale, production environments
• Demonstrated experience managing global engineering teams in a senior leadership capacity
• Proven expertise in High Availability systems design, disaster recovery, and business continuity planning

• Bachelor’s degree/University degree or equivalent experience
• Master’s degree preferred

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.

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, please review Accessibility at Citi.

View Citi’s EEO Policy Statement and the Know Your Rights poster.