💼 Full-Time Position

Mainframe Middleware Infra Engineer – CICS Liberty

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Vallum Associates
📍 London, London, United Kingdom
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Location
London, United Kingdom
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Posted
June 07, 2026
Type
Full-Time
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Full-Time Opportunity: This is a permanent, full-time position with a competitive package and real career growth potential.

Job Description

Role: Mainframe Middleware Infra Engineer – CICS Liberty

Location: London/Edinburgh

Type of Job: Contract

Mode of work: Hybrid -2-3 days onsite in week

JD:

Key Responsibilities

•CICS & z/OS Systems Engineering Expertise – Individual must display deep practical experience with how CICS runs on z/OS, beyond application development.

•IBM WebSphere Liberty (CICS Liberty) & Java Runtime Skills - A CICS Liberty Infrastructure Engineer must understand Liberty as a runtime and have experience in configuring the runtime

•Security, Integration & Modern Ops Practices - CICS Liberty environments are exposed to modern integration patterns and strict security requirements.

Essential skills/knowledge/experience:

• CICS system setup and configuration (regions, JVM servers)

• Understanding of z/OS components used by CICS Liberty (USS, RACF, TCP/IP, SMF)

• Capacity planning, performance tuning, and availabili...