Mainframe Network Engineer (z/OS) — Secure Connectivity

Kyndryl; Phoenix (AZ); On-site; USD 110,000 - 150,000; Full time

Job summary

Kyndryl is seeking a skilled Mainframe Network Engineer to design, configure, and support network connectivity for IBM mainframe environments. You will enable reliable, secure, and high-performing communication between mainframe systems, distributed platforms, and enterprise applications in a large enterprise setting.

Responsibilities include configuring z/OS Communications Server, TCP/IP, VTAM, SNA, EE, and TN3270, plus ensuring secure data exchange and DR readiness.

Qualifications

• Minimum 5+ years of experience in mainframe networking or z/OS communications support.
• Familiarity with JCL, TSO/ISPF, SDSF.
• Ability to analyze logs, traces, and dumps related to communications issues.
• Solid knowledge of TCP/IP on z/OS, VTAM, SNA/Enterprise Extender, TN3270, FTP/SFTP and TLS.

Responsibilities

• Install, configure, and maintain z/OS Communications Server components.
• Support and manage TCP/IP configuration on z/OS systems.
• Maintain and troubleshoot VTAM definitions and network resources.
• Configure and support Enterprise Extender and SNA connectivity.
• Maintain TN3270 access and session-related connectivity for end users and applications.
• Ensure stable communication between mainframe systems and distributed servers, external vendors, and internal applications.
• Assist with firewall rule validation, port usage reviews, and vulnerability remediation.
• Support DR tests and business continuity exercises.

Skills

Mainframe networking

z/OS TCP/IP

VTAM/SNA/EE

TN3270/FTP/SFTP

TLS security

Log analysis

JCL/TSO/ISPF

Tools

Connect Direct

Job description

Kyndryl is seeking a skilled Mainframe Network Engineer to design, configure, and support network connectivity for IBM mainframe environments. You will enable reliable, secure, and high-performing communication between mainframe systems, distributed platforms, and enterprise applications in a large enterprise setting.

Responsibilities include configuring z/OS Communications Server, TCP/IP, VTAM, SNA, EE, and TN3270, plus ensuring secure data exchange and DR readiness.