Mainframe Network Engineer

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

Who We Are At Kyndryl, we design, build, manage and modernize the mission-critical technology systems that the world depends on every day. So why work at Kyndryl? We are always moving forward – always pushing ourselves to go further in our efforts to build a more equitable, inclusive world for our employees, our customers and our communities.

The Role

About the Role: The Mainframe Network Engineer is responsible for the design, configuration, implementation, and support of network connectivity for IBM mainframe environments. This role ensures reliable, secure, and high-performing communication between mainframe systems, distributed platforms, external partners, and enterprise applications. The engineer will work on key technologies such as TCP/IP, VTAM, SNA, Enterprise Extender, TN3270, FTP, and network security controls, supporting critical production workloads in large enterprise environments.

Role Responsibilities

Mainframe Network Administration

• 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 (EE) and SNA connectivity where applicable
• Maintain TN3270 access and session-related connectivity for end users and applications.

Network Connectivity & Support

• Ensure stable communication between mainframe systems and:
• Distributed servers
• External vendors/partners
• Internal enterprise applications
• Middleware platforms
• Diagnose and resolve connectivity issues involving:
• IP routing
• Port communication
• Session failures
• DNS resolution
• Firewall-related blocks
• Support file transfer protocols such as FTP, SFTP, and other secure data exchange solutions.

Security & Compliance

• Work closely with network security teams to enforce secure communication protocols.
• Ensure compliance 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.

Disaster Recovery & Resiliency

• Support network design and recovery procedures for Disaster Recovery (DR) environments.
• Validate communication paths for failover systems and backup data centers.
• Participate in DR tests and business continuity exercises.

Required 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 dump information relevant to communications issues
• Solid knowledge and experience on TCP/IP on z/OS , VTAM, SNA / Enterprise Extender, TN3270, FTP / SFTP and TLS.

Preferred Experience

• Experience in supporting transmission products, such as Connect Direct.
• The ability to work independently as well as part of a team
• Excellent troubleshooting and customer service skills
• Participate in on-call rotation with the engineering teams
• The ability to follow a project through to completion, and/or to work as part of a larger team to complete the components of a complex project
• IBM mainframe or networking certifications are a plus

Who You Are

Being You Diversity is a whole lot more than what we look like or where we come from, it’s how we think and who we are. We welcome people of all cultures, backgrounds, and experiences. But we’re not doing it single-handily: Our Kyndryl Inclusion Networks are only one of many ways we create a workplace where all Kyndryls can find and provide support and advice. This dedication to welcoming everyone into our company means that Kyndryl gives you – and everyone next to you – the ability to bring your whole self to work, individually and collectively, and support the activation of our equitable culture. That’s the Kyndryl Way.

What You Can Expect

With state-of-the-art resources and Fortune 100 clients, every day is an opportunity to innovate, build new capabilities, new relationships, new processes, and new value. Kyndryl cares about your well‑being and prides itself on offering benefits that give you choice, reflect the diversity of our employees and support you and your family through the moments that matter – wherever you are in your life journey. Our employee learning programs give you access to the best learning in the industry to receive certifications, including Microsoft, Google, Amazon, Skillsoft, and many more. Through our company-wide volunteering and giving platform, you can donate, start fundraisers, volunteer, and search over 2million non-profit organizations. At Kyndryl, we invest heavily in you, we want you to succeed so that together, we will all succeed.

We're Glad You're Here

At Kyndryl, we achieve progress the world depends on, with purpose. Beginning with the purpose that matters to you. Because here, you will be part of a culture designed with purpose. One that is restless, empathetic and devoted. Where we are committed to sustainable progress for our customers and supporting the communities where we work and live. All of you is what we want. And what we need. Join us, and together, we can advance the vital systems that power human progress.