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Application Support Engineer (IBM z/OS Platform)

Posted November 21, 2025
Full-time Mid-Senior Level

Job Overview

As an Application Support Engineer (IBM z/OS Platform) at ATPCO, you will be responsible for the implementation, enhancement, and maintenance of a wide range of ATPCO applications and services. In this role, you will collaborate with cross-functional teams to design and develop software solutions that align with business objectives, ensuring high performance, scalability, and reliability. You'll also play a critical role in improving existing applications, integrating new features, and maintaining system functionality to meet evolving business need

Roles and Responsibilities

  • Provide 24x7 Tier 2 support for all ATPCO applications and systems during both day and night oncall rotations, including weekends and holidays
  • Support resolution of production issues, ensuring effective communication and customer satisfaction.
  • Provide support during business hours for non-production environments.
  • Perform applications and database maintenance activities such as MPM data uploads, historical data migrations, back-door data fixes and address customer subscription data processing issues.
  • COBOL programs and JCL maintenance
  • Maintain deep understanding of ATPCO enterprise environment to quickly diagnose and resolve issues and keep abreast of changes to ATPCO applications and technologies.
  • Work with business, product and technical teams to analyze problems, assess risks, and implement solutions.
  • Work with PSS Tier 1 to maintain and optimize Control-M/EM batch processing jobs
  • Take ownership of triaging production issues, and resolve or escalate appropriately, ensuring continuity of service.
  • Monitor systems such as ServiceNow, Splunk Oncall, alerts, and group emails, and respond to issues in a timely manner.
  • Produce regular Applications /system and performance metrics and reports for IT management using DB2 SQL and other tools.

 

Technical Skills Requirements:

IBM DB2 skills (SQL queries, stored procedures, performance tuning), Redis, Neo4J, MySQL, MongoDB, IBM Job Control Language (JCL), Shell scripting, COBOL, CICS, J2EE, Java batch, Control-M/EM Enterprise Scheduler, Linux, z/OS (TSO/ISPF), VMware, MQ Series, WebSphere, J2EE Applications  structure familiarity, ServiceNow, Monitoring Tools: (Grafana, Splunk, Dynatrace, site24x7, SolarWinds,  AWS CloudWatch),  XML, JDBC, experience in parsing Linux logs.

Professional Skills and experience:

  • Minimum 2+ years of IBM Mainframe and Distributed web/Cloud-based applications 24/7 support experience, including nights, weekends, and holidays
  • Proven track record in IT Operations / Applications Production Support within complex enterprise environments.
  • Builds initial rapport with team members, developing trust within the immediate team
  • Accepts and integrates constructive feedback positively.
  • Cooperatively engages with peers to achieve shared goals.
  • Requires understanding and general application of concepts, theories, and principles to the area of work.                  
  • Absorb new information when presented systematically and applies it effectively.
  • Assists in debugging and troubleshooting issues under the supervision of senior engineers
  • Proactively learns new skills and applies them to improve their work under the guidance of more senior team members.
  • Engage in informal coaching and knowledge-sharing with colleagues and contribute to a collaborative and growth-oriented work environment.
  • Background in Applications development/programming.
  • Excellent analytical, troubleshooting, and problem-solving skills.
  • Excellent oral and written communication skills for technical and non-technical stakeholders.
  • Strong business acumen with the ability to quickly understand operational and business incident impact.
  • Ability to take full ownership of production problems, anticipate and mitigate risks, escalate appropriately, and deliver workarounds under pressure.
  • Proven ability to multi-task and prioritize urgent issues to meet SLA and KPI requirement
  • Strong knowledge of DB2 (SQL queries, stored procedures, Application SQL performance tuning).
  • Strong knowledge in JCL (Job Control Language)
  • TSO/ISPF/SDSF experience.

 

Salary Range:  USD $98,000 – $115,000

*The disclosed range estimate has not been adjusted for applicable geographic differential associated with the location*

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