Senior Mainframe Systems Programmer – Site Reliability Engineer

About the role

Ensono is looking for a senior Mainframe Site Reliability Engineer to transform its mission‑critical z/OS environment. The role blends deep mainframe expertise with modern SRE practices, focusing on automation, AI‑driven observability, and DevOps integration to build self‑healing systems that meet strict service‑level objectives.

Key responsibilities

• Design and deploy Infrastructure‑as‑Code solutions (Ansible, Zowe CLI, z/OSMF) to automate provisioning, configuration, and recovery of CICS, Db2, IMS subsystems.
• Implement AI‑driven monitoring (IBM Watson AIOps, Splunk ITSI) and build Grafana/Prometheus dashboards for the Four Golden Signals.
• Modernize mainframe CI/CD pipelines using IBM DBB, UrbanCode Deploy, Git, and Jenkins, and convert legacy REXX/NCL scripts to version‑controlled pipelines.
• Optimize performance and capacity through CPU/MIPS tuning, SMF/RMF analysis, and dynamic hardware scaling strategies.
• Lead blameless post‑mortems, create automated incident‑response playbooks, and maintain 24/7 on‑call rotation.
• Enforce security best practices (RACF, TLS) and develop reusable runbooks and workbooks for knowledge sharing.

Required profile

• Several years of experience in z/OS system programming, performance tuning, or infrastructure support.
• Bachelor’s degree in Computer Science, Engineering, or a related field.
• Proven ability to lead cross‑functional teams during high‑severity incidents.

Required skills

• z/OS, JCL, REXX, Python.
• Ansible, Zowe CLI, Git, Jenkins, IBM Dependency‑Based Build, UrbanCode Deploy.
• AI/ML monitoring tools such as IBM Watson AIOps, Splunk ITSI.
• Grafana, Prometheus, IBM Z System Automation, Broadcom OPS/MVS.