IBMz Network Engineer

Posted One Month Ago
Be an Early Applicant
4 Locations
In-Office
Senior level
Information Technology • Business Intelligence • Consulting
The Role
Support and maintain large-scale IBM Z and z/OS mainframe network environments. Configure TCP/IP, VTAM, OSA adapters, Enterprise Extenders, AT-TLS, IPsec, certificates, and file transmission products. Provide 24x7 support, troubleshoot connectivity and security issues, perform trace and error analysis, manage changes, and collaborate with technical, application, and operations teams.
Summary Generated by Built In

Make an impact with NTT DATA
Join a company that is pushing the boundaries of what is possible. We are renowned for our technical excellence and leading innovations, and for making a difference to our clients and society. Our workplace embraces diversity and inclusion – it’s a place where you can grow, belong and thrive.

Your day at NTT DATA
In this role you will be joining a team of technical professionals supporting a large-scale z/OS systems platform. This position requires an experienced systems programmer supporting the z/OS Mainframe Network environment. Responsibilities include configuring and maintaining the integrity and data/IP security of the Mainframe's host communication subsystems and associated program products.

Your responsibilities will include: 

  • Being part of a multi-functional team, supporting IBM mainframe networks and transmissions products and infrastructure.
  • Participation in support rota providing 24x7 cover.
  • Perform TCPIP Port Reserves (Additions, Deletions, Changes) Perform VTAM updates (Additions, Deletions, Changes)
  • Manage OSA Adapters in a complex mainframe environment
  • Perform VTAM PU/LU updates (Additions, Deletions, Changes) including Enterprise Extenders (EE)
  • Implement AT-TLS rules (digital certificate management). Configure and manage IPSEC policies (permit/deny rules, VPN- ipsec tunnels)
  • Trace, Debug and Error Analysis
  • Communicate regularly with technical, applications and operational staff to ensure Network connectivity and security (may involve some after hours and weekend work)

The ideal candidate for this role will have the below experience and qualifications: 

  • Experience in administering file transmissions products such as Connect:Direct and FTP, or alternatively good experience as a user of these products.
  • Knowledge of z/OS and z/OS utilities.  
  • Understanding of z/OS networking services, structure and related software and protocols.
  • Understanding of network security disciplines (IPSec, TLS/SSL, certificates, etc) and how they relate to file transmission.
  • Experience of problem management from initial diagnosis through to resolution.
  • Understanding of the Change Management process.
  • Ability to customize and manage secure SNA and TCP/IP networks under z/OS.
  • Knowledge of mainframe network management tools, e.g. NetMaster, and multi-session manager products such as TUBES and Supersession.
  • Experience of managing mainframe printing products.
  • General z/OS systems programming experience.
  • Knowledge of System z hardware including the OSA-Express network cards.
  • Excellent problem-solving and analytical skills
  • Good communication, teamwork and negotiation skills
  • Familiarity with the Cisco Network Solutions 
  • The ability to work to tight deadlines under pressure
  • Good organisational skills
  • Flexibility and adaptability
  • The ability to create and maintain strong working relationships with colleagues and customers
  • Business awareness and understanding of business requirements of IT
  • A willingness to keep up to date with developments in new technology
  • An understanding of information legislation, such as the Data Protection Act.
  • Experience of working as a z/OS Systems Specialist in the IT industry.

Workplace type:


About NTT DATA
NTT DATA is a $30+ billion business and technology services leader, serving 75% of the Fortune

Global 100. We are committed to accelerating client success and positively impacting society through

responsible innovation. We are one of the world’s leading AI and digital infrastructure providers, with

unmatched capabilities in enterprise-scale AI, cloud, security, connectivity, data centers and

application services. Our consulting and industry solutions help organizations and society move

confidently and sustainably into the digital future. As a Global Top Employer, we have experts in more

than 70 countries. We also offer clients access to a robust ecosystem of innovation centers as well as

established and start-up partners. NTT DATA is part of NTT Group, which invests over $3 billion each

year in R&D.


Equal Opportunity Employer
NTT DATA is proud to be an Equal Opportunity Employer with a global culture that embraces diversity. We are committed to providing an environment free of unfair discrimination and harassment. We do not discriminate based on age, race, colour, gender, sexual orientation, religion, nationality, disability, pregnancy, marital status, veteran status, or any other protected category. Join our growing global team and accelerate your career with us. Apply today.


Third parties fraudulently posing as NTT DATA recruiters 

NTT DATA recruiters will never ask job seekers or candidates for payment or banking information during the recruitment process, for any reason. Please remain vigilant of third parties who may attempt to impersonate NTT DATA recruiters whether in writing or by phone in order to deceptively obtain personal data or money from you. All email communications from an NTT DATA recruiter will come from an @nttdata.com email address. If you suspect any fraudulent activity, please contact us.

Skills Required

  • Experience administering or using Connect:Direct and FTP file transmission products
  • Knowledge of z/OS and z/OS utilities
  • Understanding of z/OS networking services, structure, software, and protocols
  • Understanding of IPSec, TLS/SSL, certificates, and network security as they relate to file transmission
  • Experience managing problems from initial diagnosis through resolution
  • Understanding of change management processes
  • Ability to customize and manage secure SNA and TCP/IP networks under z/OS
  • Knowledge of mainframe network management tools such as NetMaster and multi-session managers such as TUBES and Supersession
  • Experience managing mainframe printing products
  • General z/OS systems programming experience
  • Knowledge of System Z hardware and OSA-Express network cards
  • Excellent problem-solving and analytical skills
  • Good communication, teamwork, and negotiation skills
  • Familiarity with Cisco Network Solutions
  • Ability to work under pressure and meet tight deadlines
  • Good organizational skills
  • Flexibility and adaptability
  • Ability to build strong relationships with colleagues and customers
  • Business awareness and understanding of IT business requirements
  • Willingness to keep current with new technology developments
  • Understanding of information legislation, including the Data Protection Act
  • Experience working as a z/OS Systems Specialist in the IT industry

NTT DATA Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about NTT DATA and has not been reviewed or approved by NTT DATA.

  • Fair & Transparent Compensation — Feedback suggests salary bands and grades are clearly defined, making ranges and promotion criteria easier to understand. Standardized HR processes provide visibility into levels across common delivery roles.
  • Healthcare Strength — Feedback suggests the package includes comprehensive medical, dental, and vision options with HSA/FSA eligibility. Global materials emphasize comprehensive insurance and wellbeing as baseline offerings across regions.
  • Wellbeing & Lifestyle Benefits — Flexible work options, including remote/hybrid arrangements, are highlighted as core benefits and can support work–life balance. Some delivery teams report more manageable hours than strategy consultancies, improving perceived value for time.

NTT DATA Insights

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The Company
HQ: Tokyo
55,092 Employees
Year Founded: 1988

What We Do

NTT DATA, Inc. is a trusted global innovator of business and technology services. We're committed to helping clients innovate, optimize and transform for long-term success. Our R&D investments help organizations and society move confidently and sustainably into the digital future. As a Global Top Employer, we have diverse experts in more than 50 countries and a robust partner ecosystem of established and start-up companies. Our services include business and technology consulting, data and artificial intelligence, industry solutions, as well as the development, implementation and management of applications, infrastructure, and connectivity

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