Mainframe Network Engineer

Kyndryl • Phoenix, AZ

1d

About The Position

The Mainframe Network Engineer designs, configures, implements, and supports network connectivity for IBM mainframe environments. The role ensures reliable, secure, high-performing communication between mainframe systems, distributed platforms, external partners, and enterprise applications, supporting critical production workloads in large enterprise environments.

The engineer administers z/OS Communications Server components and supports TCP/IP, VTAM, SNA, Enterprise Extender, TN3270, FTP/SFTP, and network security controls. The role also supports connectivity troubleshooting, secure data exchange, disaster recovery and resiliency activities, and compliance with enterprise security controls and audit requirements. The position participates in an on-call rotation with engineering teams.

Requirements

• At least 5 years of experience in mainframe networking or z/OS communications support.
• Familiarity with JCL, TSO/ISPF, and SDSF.
• Ability to analyze logs, traces, and dump information relevant to communications issues.
• Solid knowledge and experience with TCP/IP on z/OS, VTAM, SNA/Enterprise Extender, TN3270, FTP/SFTP, and TLS.
• Ability to work independently and as part of a team.
• Excellent troubleshooting and customer service skills.

Nice To Haves

• Experience supporting transmission products such as Connect:Direct.
• IBM mainframe or networking certifications.

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 where applicable.
• Maintain TN3270 access and session-related connectivity for end users and applications.
• Ensure stable communication between mainframe systems and distributed servers, external vendors and partners, internal enterprise applications, and middleware platforms.
• Diagnose and resolve connectivity issues involving IP routing, port communication, session failures, DNS resolution, and firewall-related blocks.
• Support FTP, SFTP, and other secure data exchange solutions.
• Work with network security teams to enforce secure communication protocols and comply with enterprise security controls and audit requirements.
• Support SSL/TLS certificate implementation and secure transmission standards.
• Assist with firewall rule validation, port usage reviews, and vulnerability remediation.
• Support network design and recovery procedures for disaster recovery environments.
• Validate communication paths for failover systems and backup data centers.
• Participate in disaster recovery tests and business continuity exercises.
• Participate in an on-call rotation with engineering teams.
• Follow projects through to completion or contribute to assigned components of complex projects.

Benefits

• Employee learning programs and access to certification training.
• Company-wide volunteering and giving platform.

What This Job Offers

• Job Type: Full-time
• Education Level: No Education Listed