Network Engineer – Mainframe

About the role

The role provides technical consultation supporting the design, availability and performance of mainframe networking. It requires extensive knowledge of mainframe networking, close liaison with other technical support areas, and participation in a 24 × 7 on‑call roster.

Key responsibilities

• Engineer and support TCP/IP across multiple LPARs.
• Maintain TCP/IP profiles, configuration, and stack standardisation.
• Design and support VIPA, DVIPA, routing, and sysplex‑aware networking.
• Support VTAM, APPN, Enterprise Extender and OSA connectivity in collaboration with enterprise network teams.
• Diagnose and resolve cross‑platform connectivity issues.
• Manage RACF certificates from a network connectivity perspective.
• Support secure file transfer and encrypted network services.
• Perform packet tracing and advanced diagnostics.
• Ensure software solutions enable high‑availability development.
• Provide input into technology project resource estimations.

Required profile

• High‑level skill in mainframe VTAM network administration.
• Knowledge of IBM’s z/OS operating system.
• Experience with network tracing utilities.
• Familiarity with z/OSMF Network Configuration Assistant, IPSec and AT‑TLS policies.
• Ability to work collaboratively across organisational boundaries.
• Strong analytical and problem‑solving abilities.
• Proven customer focus and effective communication skills.
• Understanding of business requirements and ability to translate them into cost‑effective solutions.
• Track record of implementing and supporting technology services.
• Strong organisational and commercial acumen.

Required skills

• VTAM network administration
• IBM z/OS
• TCP/IP
• LPAR
• VIPA and DVIPA
• Routing and sysplex‑aware networking
• APPN, Enterprise Extender, OSA connectivity
• RACF certificate management
• Secure file transfer and encrypted network services
• Packet tracing and advanced diagnostics
• z/OSMF Network Configuration Assistant
• IPSec and AT‑TLS configuration