Hybrid Mainframe Networking Specialist

Cognizant

Guadalajara

Hybrid

MXN 450,000 - 750,000

Full time

14 days+

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Job summary

Cognizant in Mexico invites applications for a Mainframe Network / Communication Server Systems Programmer. You will install, configure, and maintain IBM z/OS Communications Server components, ensuring high availability of critical enterprise systems across multiple LPARs.

The role focuses on VTAM/TCP-IP, EE, SNA, TLS/S SAF/RACF security, and performance tuning. Hybrid role in Guadalajara or Mexico City; advanced English required.

Qualifications

Expertise in IBM Communications Server (VTAM/TCP-IP).
z/OS Communications Server administration.
Experience with Enterprise Extender, SNA, TCP/IP networking.
Familiarity with OSA, HiperSockets, Sysplex networking.
Security integration with TLS/SSL, AT-TLS, SAF/RACF.
Network performance tuning and troubleshooting.
Experience with network automation and monitoring tools.

Responsibilities

Install, configure, upgrade and maintain IBM z/OS Communications Server components (VTAM, TCP/IP, EE, FTP, Telnet, TN3270).
Manage SNA and TCP/IP networking, OSA Express, HiperSockets and Sysplex networking.
Monitor performance, analyze bottlenecks and optimize throughput using RMF/SMF and related tools.
Diagnose complex issues, coordinate with IBM support and infrastructure teams to resolve incidents.

Skills

IBM Communications Server

z/OS Communications Server admin

Enterprise Extender (EE)

SNA

TCP/IP networking

OSA/HiperSockets

Sysplex networking

TLS/SSL, AT-TLS, SAF/RACF

Network performance tuning

Network monitoring tools

Job description

The role focuses on VTAM/TCP-IP, EE, SNA, TLS/S SAF/RACF security, and performance tuning. Hybrid role in Guadalajara or Mexico City; advanced English required.

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