Senior Mainframe Network Architect (z/OS)

0014 DXC Technology Spain, S.A.; Avilés; On-site; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

Life and disability insurance

Retirement savings plan

Paid holidays and time off

Job summary

DXC Technology Spain, S.A. is seeking a Senior Mainframe Network System Programmer to administer and secure IBM z/OS network infrastructure.

You will install, configure, and optimize z/OS network software, ensure connectivity and security, and support critical business services across global operations. The role requires 8+ years of mainframe experience, strong leadership, and hands-on skills in TCP/IP, VTAM/SNA, and enterprise security.

Qualifications

• 8+ years of experience in Mainframe Network Systems Programming or Administration.
• Fluent English (written and spoken) is mandatory.
• Strong expertise in IBM z/OS Communications Server, TCP/IP, VTAM/SNA, APPN/HPR, and Enterprise Extender.
• Experience with network security technologies including AT‑TLS, TLS certificates, IPsec, IP filtering, SSH, and secure file transfer protocols.
• Knowledge of VIPA/DVIPA, Sysplex Distributor, Parallel Sysplex networking, and high‑availability environments.
• Hands-on experience with z/OS commands, TSO/ISPF, JCL, network diagnostics, monitoring, and performance tuning.
• Experience with disaster recovery, incident management, change management, and production support.
• Automation and scripting skills using REXX, CLIST, USS Shell, or similar tools.

Responsibilities

• Install, configure, upgrade, and maintain z/OS network software and services
• Manage and optimize TCP/IP and VTAM/SNA environments for performance and reliability
• Ensure network security, resilience, and operational stability across mainframe environments
• Troubleshoot complex connectivity and performance issues using z/OS diagnostics and monitoring tools
• Support migrations, infrastructure upgrades, and disaster recovery activities
• Collaborate with cross-functional technical teams and vendors on network infrastructure initiatives
• Provide technical leadership and mentoring to junior team members
• Participate in a 24x7 on‑call rotation to support business‑critical services
• Implement and manage network security technologies including AT‑TLS, TLS certificates, IPsec, and secure file transfer protocols
• Develop and maintain automation scripts using REXX, CLIST, or USS Shell to streamline operations

Skills

Mainframe Networking

IBM z/OS Communications Server

TCP/IP

VTAM/SNA

AT-TLS/IPsec

TSO/ISPF/JCL

REXX/USS Shell scripting

Tools

VIPA/DVIPA

Sysplex Distributor

Job description

DXC Technology Spain, S.A. is seeking a Senior Mainframe Network System Programmer to administer and secure IBM z/OS network infrastructure.

You will install, configure, and optimize z/OS network software, ensure connectivity and security, and support critical business services across global operations. The role requires 8+ years of mainframe experience, strong leadership, and hands-on skills in TCP/IP, VTAM/SNA, and enterprise security.