Role & responsibilities

- Network Infrastructure Management: Configure, maintain, and optimize the IBM Communication Server for z/OS workplace, ensuring stable communication via VTAM and TCP/IP protocols.
- High Availability & Routing Administration: Implement and manage advanced IBM TCP/IP functionalities, including Sysplex Distributor, z/OS Policy Agent (PAGENT), OSPF routing protocols, and SNMP network monitoring.
- Mainframe Certificate Management: Oversee and execute Mainframe Certificate Management lifecycle tasks using the GSKKYMAN utility, establishing, renewing, and implementing secure key rings, SSL/TLS certificates, and cryptographic keys to protect network communications.
- Secure File Transfer Oversight: Administer enterprise-grade Mainframe File Transfer Technologies, supporting automated and ad-hoc transmissions using IBM Connect:Direct and secure IBM FTPS channels.
- Session & Management Tooling Support: Maintain, upgrade, and customize network third-party utilities, specifically the NC-Access session manager (Quest Software) and the Syncsort ZEN Network Management Suite.
- Network Diagnostics & Troubleshooting: Conduct root-cause analysis on highly complex connectivity, latency, and performance anomalies using comprehensive Mainframe TRACE analysis (including Packet, Component, and OSA traces) alongside z/OS diagnostic tools.
- Project Support & Compliance: Act as the core mainframe networking resource for internal infrastructure upgrades and disaster recovery testing, while producing technical documentation compliant with regional and global regulatory policies.

Required Technical Skills & Qualifications

- Core Operating Systems:



Deep technical knowledge of the IBM z/OS operating system architecture and system libraries.
- Communications Server: Expert-level capabilities in IBM Communication Server for z/OS, with extensive hands-on experience tuning VTAM (SNA) and TCP/IP stacks.
- Advanced TCP/IP Subsystems: Strong competency configuring Sysplex Distributor for workload balancing, z/OS Policy Agent for network policies/AT-TLS, OSPF for dynamic routing, and SNMP integrations.
- Certificate & Security Tooling: Proven experience with Mainframe Certificate Management and the GSKKYMAN utility for generating, installing, and managing digital certificates, keys, and key database files.
- Data Movement Protocols: Demonstrated experience setting up, securing, and maintaining IBM Connect:Direct and IBM FTPS systems.
- Network Software Management: Direct experience administering NC-Access (Quest Software) and utilizing the Syncsort ZEN Network Management Suite for real-time infrastructure visibility.
- Problem Determination: Advanced diagnostic background executing and interpreting Mainframe TRACES to quickly resolve high-priority network incidents.
- Automation & Scripting: Proficiency in REXX, CLIST, or JCL to build scripts that automate routine network systems programming tasks.

Preferred candidate profile

Soft Skills & Operational Requirements

- Excellent analytical skills with a methodical approach to system change management and problem-solving.
- Strong verbal and written communication skills to articulate technical complexities to cross-functional teams.
- Capability to manage multiple high-priority infrastructure deliverables in parallel.
- Willingness to participate in a 24x7 on-call rotation to support critical business services during off-hours.

📌 Mainframe Schedulling (India)
🏢 Tata Consultancy Services
📍 India