As a Mainframe Host Network Support (HNS) SME at Kyndryl, you ll solve complex problems and identify potential future issues across the spectrum of platforms and services. You ll be at the forefront of new technology and modernization, working with some of our biggest clients which means some of the biggest in the world.

There s never a typical day as a System Administrator at Kyndryl, because no two projects are alike. You ll be managing systems data for clients and providing day-to-day solutions and security compliance. You ll oversee a queue of assignments and work directly with technicians, prioritizing tickets to deliver the best solutions to our clients.

One of the benefits of Kyndryl is that we work with clients in a variety of industries, from banking to retail. Whether you want to broaden your knowledge base or narrow your scope and specialize in a specific sector, you can find your opportunity here. You ll also get the chance to share your expertise by recommending modernization options, identifying new business opportunities, and cultivating relationships with other teams and stakeholders. Does the work get challenging at times Yes! But you ll collaborate with a diverse group of talented people and gain invaluable management and organizational skills, which will come in handy as you move forward in your career.

Key Responsibilities

- Provide end-to-end support for Mainframe Host Network Systems (HNS), including incident resolution, problem management, and performance optimization
- Act as a Network Communications SME, supporting enterprise-grade mainframe customer environments
- Administer and maintain z/OS Communication Server components (VTAM TCP/IP stack)




- Perform advanced problem determination using traces, dumps, and logs
- Manage and support PAGENT configurations and policy-based networking
- Provide expertise in TCP/IP configuration, tuning, and troubleshooting
- Analyze and resolve network connectivity, performance, and latency issues across host systems
- Support VTAM definitions, resources, and session management
- Perform network trace analysis (IP traces, packet traces, VTAM traces) to diagnose complex network issues
- Participate in project implementations, migrations, and transformation initiatives involving host networking
- Ensure system stability, security, and compliance for communication subsystems
- Collaborate with cross-functional teams (z/OS SysProg, storage, distributed teams, network engineering)
- Support customer escalations and provide timely resolution within SLA commitments

Who You Are

You re good at what you do and possess the required experience to prove it. However, equally as important you have a growth mindset; keen to drive your own personal and professional development. You are customer-focused someone who prioritizes customer success in their work. And finally, you re open and borderless naturally inclusive in how you work with others.

Required Technical and Professional Expertise





- 10+ years of Experience in Mainframe Networking / HNS support
- Proven experience as a Subject Matter Expert in HNS / VTAM / TCP-IP on z/O and z/OS Communication Server
- Expertise in PAGENT (Policy Agent) and solid understanding of network protocols, routing concepts, and SNA/IP networking in mainframe environments
- Proven experience in advanced troubleshooting, including packet trace analysis, performance tuning, debugging, and resolution of complex production incidents
- Solid knowledge of Host Networking Services (HNS) system programming concepts
- Strong understanding of high availability architectures, failover mechanisms, and resilience configurations
- Ability to manage and support mission-critical enterprise production environments
- Demonstrated experience in root cause analysis and technical problem resolution
- Experience working in customer-facing roles and managed services/global delivery environments

Preferred Technical and Professional Experience

- Experience with advanced networking technologies such as Enterprise Extender (EE), HiperSockets, and OSA adapters
- Knowledge of security protocols including AT-TLS and IPSec
- Exposure to automation tools and scripting (e.g., REXX, Ansible, or similar)
- Experience with monitoring tools and AIOps platforms
- Prior experience working in large-scale global delivery environments

Disclaimer : This job posting has been aggregated from external source. Role details, content, and availability are subject to change. Applicants are advised to confirm the latest information directly on the company website before applying.

📌 Mainframe Host Network Support (HNS) SME (Chennai)
🏢 Kyndryl
📍 Chennai