In this role you will maintain and secure a large‑scale z/OS mainframe network platform. You will join a multi‑functional team focused on IBM mainframe networking, ensuring reliable connectivity and data/IP security for host subsystems and product suites. You’ll handle critical configuration, issue resolution, and 24x7 support to keep transmission services running. This is an opportunity to work at scale with established mainframe tooling while contributing to responsible innovation. You will collaborate across technical, application, and operations teams to drive stable, secure mainframe environments.Configure and maintain the integrity and data/IP security of the Mainframe host communication subsystems and associated productsSupport IBM mainframe networks and transmission products and infrastructure as part of a multi‑functional teamParticipate in 24x7 on‑call support rotaPerform TCPIP Port Reserves (Additions, Deletions, Changes)Perform VTAM updates (Additions, Deletions, Changes) and PU/LU updates including Enterprise ExtendersManage OSA Adapters in a complex mainframe environmentImplement AT‑TLS rules (digital certificate management)Configure and manage IPSEC policies (permit/deny rules, VPN/IPsec tunnels)Trace, debug and perform error analysisCommunicate with technical,



applications and operational staff to ensure network connectivity and security (including after hours)Experience administering file transmission products such as Connect:Direct and FTP (or as a user)Knowledge of z/OS and z/OS utilitiesUnderstanding of z/OS networking services, structure and related software and protocolsUnderstanding of network security disciplines (IPSec, TLS/SSL, certificates) and their relation to file transmissionExperience with problem management from diagnosis to resolutionUnderstanding of Change Management processesAbility to customize/manage secure SNA and TCP/IP networks under z/OSKnowledge of mainframe network management tools (NetMaster) and multi‑session products (TUBES, Supersession)Experience managing mainframe printing productsKnowledge of System z hardware including OSA-Express network cardsExcellent problem‑solving and analytical skillsGood communication, teamwork and negotiation skillsFamiliarity with Cisco Network SolutionsAbility to work to tight deadlines under pressureGood organizational skillsFlexibility and adaptabilityAbility to build strong relationships with colleagues and customersBusiness awareness and understanding of IT business requirementsWillingness to stay updated with new technologyUnderstanding of Data Protection ActExperience as a z/OS Systems Specialist in ITGood communicationTeamworkNegotiationz/OS and z/OS utilitiesTCP/IP networkingVTAM and Enterprise ExtendersIBMz Network Engineer - NTT barcelona, catalunya, es#J-18808-Ljbffr

📌 Ibmz Network Engineer - Ntt (Barcelona)
🏢 Ntt
📍 Barcelona