Mainframe z/OS Network Engineer - Security & TCP/IP

NTT America, Inc.; Barcelona; On-site; EUR 60,000 - 110,000; Full time

Job summary

NTT DATA is seeking a seasoned z/OS Systems Specialist to join a multinational mainframe team. You will configure and sustain the Mainframe’s host communication subsystems, including VTAM and OSA adapters, while aligning with security policies and IPsec/TLS rules.

You will participate in round-the-clock support, collaborate with technical teams, and help resolve complex networking and security issues on the z/OS platform.

Qualifications

• Experience in administering z/OS and networking services.
• Solid understanding of security protocols (IPSec, TLS/SSL) and certificates.
• Ability to diagnose, troubleshoot and resolve mainframe network issues.

Responsibilities

• Support a large-scale z/OS systems platform.
• Configure and maintain host communication subsystems and programs.
• Provide 24x7 support through on-call rota and weekend work.
• Manage OSA adapters and VTAM updates in a complex mainframe environment.
• Implement AT-TLS rules and IPsec policies; ensure network security.

Skills

z/OS

Mainframe network

TCP/IP

VTAM

IPSec

TLS/SSL

Security

Problem solving

Communication

Teamwork

Organisational skills

Flexibility

Data protection

Education

Bachelor's degree in Computer Science or related

Tools

NetMaster

TUBES

Supersession

Connect:Direct

FTP

OSA Adapters

Job description

NTT DATA is seeking a seasoned z/OS Systems Specialist to join a multinational mainframe team. You will configure and sustain the Mainframe’s host communication subsystems, including VTAM and OSA adapters, while aligning with security policies and IPsec/TLS rules.

You will participate in round-the-clock support, collaborate with technical teams, and help resolve complex networking and security issues on the z/OS platform.