Senior System Administrator

We are seeking an experienced AS/400 (IBM i) Senior System Administrator to manage, configure, and optimize IBM Power Systems environments. The ideal candidate will have deep expertise in IBM i system setup, OS and system configuration, LPAR creation , and performance analysis and tuning . This role is responsible for ensuring high availability, optimal performance, security, and scalability across development, test, and production environments. The candidate will also demonstrate strong partnership and leadership with offshore resources to ensure optimal client success and seamless service delivery. KEY RESPONSIBILITIES System Administration & Configuration Install, configure, and maintain IBM i (AS/400 / iSeries) operating systems and system software Perform initial system setup , environment builds, and system lifecycle management Configure system values, subsystems, job queues, memory pools, and storage Apply PTFs, upgrades, and technology refreshes , ensuring minimal disruption Maintain and document system configurations and operational procedures LPAR & Power Systems Management Design, create, and manage Logical Partitions (LPARs) on IBM Power Systems Allocate and adjust CPU, memory, and storage resources based on workload demands Perform LPAR sizing, tuning, migrations, and capacity planning Use HMC (Hardware Management Console) for partition and hardware administration Performance Analysis & Tuning Proactively monitor and analyze system performance using IBM i performance tools Identify CPU, memory, disk I/O, and job-level bottlenecks Analyze workload performance across subsystems, job queues, and memory pools Tune system values, workloads, memory pools, and disk utilization to optimize throughput Review and analyze performance data to support capacity planning and growth forecasting Partner with application teams to diagnose and resolve performance-related issues Establish performance baselines and provide recommendations for continuous improvement Security & Access Control Manage user profiles, group profiles, authorities, and object-level security Implement security policies, auditing, and compliance controls Regularly review access rights and security configurations Backup, Recovery & High Availability Configure and manage backup and recovery strategies Support disaster recovery planning, testing, and execution Work with high availability and replication solutions (e.g., PowerHA, MIMIX, or similar) Monitoring & Operational Support Monitor system health, alerts, and resource utilization Provide advanced troubleshooting and third-level support for IBM i environments Participate in on-call rotations as required Collaborate with application, infrastructure, and business teams Provide guidance and best practices for IBM i usage and performance Maintain accurate documentation for system configurations, performance baselines, and procedures REQUIRED QUALIFICATIONS Maintain accurate documentation for system configurations, performance baselines, and procedures Strong hands-on experience in: IBM i OS installation, setup, and configuration Performance analysis and tuning (CPU, memory, disk, and workload management) LPAR creation and management on IBM Power Systems Experience with HMC and PowerVM Solid understanding of IBM i security and object authority Experience managing PTFs, upgrades, and system maintenance Strong analytical and troubleshooting skills PREFERRED QUALIFICATIONS Experience with IBM i performance tools (e.g., performance reports, monitoring utilities, or third-party tools) Exposure to PowerHA, MIMIX, or other HA/DR solutions Basic scripting skills (CL; RPG a plus) IBM certifications such as IBM Certified Administrator – IBM i Experience supporting mission-critical or regulated environments Strong analytical mindset with attention to performance detail Ability to translate performance data into actionable recommendations Excellent documentation and communication skills Self-motivated with the ability to manage priorities independently Strong collaboration and leadership skills when working with offshore resources across time zones Proactive approach to mentoring and guiding offshore team members to support consistent performance and quality outcomes Strong clients focus with the ability to align offshore delivery efforts to business needs and ensure optimal client success Mode of work: Remote About Integrative Systems: We are a reputable 20+-year-old software development and back-office optimization firm based in Chicago with clients for Microsoft applications (desktop, web, and mobile), IBMi, JDA MMS, and BPCS throughout North America and Canada. We have an exceptional work culture that is vibrant, and performance-driven – A workplace that you will aspire to be a member of. We proactively work towards creating an environment – wherein every associate is incentivized to think independently; bring to bear diverse and dynamic resources to resolve complex problems collaboratively. And most importantly, understand the meaning and growth in their work. We work with a belief that everyone associated with Integrative should grow professionally and personally. Therefore, we seek out what's best for our co-workers. We strive to create a workplace that 100 people would absolutely love, not a place that 1000 people kind of like. To achieve this, we try to create job experiences, not job opportunities. We know the importance of adding the 'FUN' in 'business fundamentals' at the right time - yet are a well-disciplined, profitable, well-oiled engine of growth. So, when we hire new talent, we lookout for someone who can balance work-life easily. We hire only the best. For a typical position, we sift through one hundred resumes and interview at least ten people. Make it in, and you'll be working with some of the best minds in the business. We understand that 'A' people attract 'A' people. We do not ride on anything short-term - no short-term market trends, short-term profits, or any short-cuts. Hence, we look for talent who usually believes in stability and commitment more than short-term benefits. We understand that when a person joins, he/she brings in various dimensions of their being physical, emotional, social, mental, and spiritual aspects to the workplace, not just vocational. And because we address all these dimensions for every associate's wellbeing, we create an environment that fosters optimism, mindfulness, authenticity, belongingness, meaning, and vitality. meaning, and vitality. #J-18808-Ljbffr Keka Technologies Private Limited