Mainframe Network Systems Programmer

Cognizant; Guadalajara; On-site; MXN 450,000 - 750,000; Full time

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

At Cognizant we have an ideal opportunity for you to be part of one of the largest companies in the digital sector worldwide. A Great Place To Work where we look for people who contribute new ideas, experiencing a dynamic and growing environment. At Cognizant we promote an inclusive culture, where we value different perspectives providing career growth and development opportunities. #WelcomeToCognizant!

We are seeking a Mainframe Network / Communication Server Systems Programmer, responsible for the installation, configuration, maintenance, and performance management of IBM Communications Server and enterprise mainframe networking infrastructure on IBM z/OS platforms. The individual will support highly available enterprise environments consisting of multiple production and disaster recovery LPARs supporting mission-critical business applications. Should have experience in Datacenter migrations.

Qualifications

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

ADVANCED ENGLISH IS A MUST

Hybrid role in Guadalajara or Mexico City

Core Responsibilities

• System Installation and Maintenance: Install, configure, upgrade, and maintain IBM z/OS Communications Server components including VTAM, TCP/IP, Enterprise Extender (EE), FTP, Telnet, TN3270, and related networking products. Apply software maintenance, PTFs, and version upgrades using SMP/E while ensuring compliance with vendor recommendations and organizational standards. Maintain network definitions, startup procedures, and configuration datasets.
• Network Infrastructure Management: Configure and administer SNA and TCP/IP networking environments. Support OSA Express adapters, HiperSockets, Sysplex Distributor, Dynamic VIPA (DVIPA), and Parallel Sysplex networking. Coordinate with distributed network teams to ensure end-to-end connectivity between mainframe and enterprise systems.
• Performance and Capacity Management: Monitor network performance, analyze communication bottlenecks, and optimize network throughput and response times. Utilize tools such as OMEGAMON for Networks, NetView, MainView, RMF, and SMF reports to identify anomalies and performance trends. Assist with capacity planning activities and network growth initiatives.
• Problem Resolution: Diagnose and resolve complex communication issues involving TCP/IP, VTAM, Enterprise Extender, SSL/TLS, and network security. Analyze packet traces, VTAM traces, dumps, and diagnostic logs to identify root causes. Work closely with network vendors, IBM support, application teams, and infrastructure teams to resolve production incidents.

Why Cognizant?

Improve your career in one of the largest and fastest growing IT services providers worldwide

Receive ongoing support and funding with training and development plans

Have a highly competitive benefits and salary package

Get the opportunity to work for leading global companies

We are committed to respecting human rights and build a better future by helping your minds and the environment

We invest in people and their wellbeing.

We create conditions for everyone to thrive. We do not discriminate based on race, religion, color, sex, age, disability, nationality, sexual orientation, gender identity or expression, or for any other reason covered.

At Cognizant we believe than our culture make us stronger!