Mainframe Performance and Capacity Analyst

Salt; United Kingdom; Remote; GBP 60,000 - 80,000; Full time

Job summary

A leading consultancy seeks a Mainframe Performance and Capacity Analyst for a contract role within the banking sector. The analyst will focus on performance tuning, capacity planning, and tooling optimization, ensuring high system availability in banking environments. Remote work is available for UK-based contractors, with a hybrid option for Denmark-based probes.

Qualifications

• 7+ years’ experience in mainframe performance tuning and capacity planning.
• Strong knowledge of SMF, RMF, WLM, and performance management tooling.
• Comfortable working in high-availability banking environments.

Responsibilities

• Monitor, analyse, and tune mainframe system and application performance.
• Conduct capacity forecasting and support infrastructure provisioning.
• Lead performance data analysis and reporting using SMF, RMF, WLM.

Skills

mainframe performance tuning

capacity planning

SMF

RMF

WLM

coding in REXX, Python, Assembler, or PL/1

ELK stack

Tools

APA

MXG

SAS

Job description

Social network you want to login/join with:

Mainframe Performance and Capacity Analyst

Client:

Salt

Location:

United Kingdom

Job Category:

Other

-

EU work permit required:

Yes

Job Reference:

5fb5ade7490f

Job Views:

4

Posted:

02.07.2025

Expiry Date:

16.08.2025

Job Description:

Contract Role: Mainframe Performance and Capacity Analyst – Banking – Inside IR35

Location: UK (Remote) or Denmark (Hybrid – 10 days/month onsite)

Duration: 6 months+

Start: ASAP

Client: Global Consultancy, End Client in the Banking Sector

Salt is working with a global consultancy delivering high-level mainframe optimisation services to a major banking client. We are recruiting an experienced Mainframe Performance and Capacity Analyst to support proactive tuning and capacity planning across critical z/OS environments.

This role sits within a Performance Competence Centre, with responsibility for system and application performance diagnostics, workload forecasting, and tooling optimisation.

Key Responsibilities:

• Monitor, analyse, and tune mainframe system and application performance
• Conduct capacity forecasting and support infrastructure provisioning
• Lead performance data analysis and reporting using SMF, RMF, WLM
• Develop and maintain custom tooling and dashboards
• Liaise with technical teams to prevent capacity-related issues
• Create documentation, reports, and performance improvement plans
• 7+ years’ experience in mainframe performance tuning and capacity planning
• Strong knowledge of SMF, RMF, WLM, and performance management tooling (APA, MXG, SAS)
• Ability to analyse batch and online application performance
• Comfortable working in high-availability banking environments
• Experience with ELK stack or in-house dashboarding tools
• Coding experience in REXX, Python, Assembler, or PL/1
• Familiarity with z/OS system internals and workload behaviours
• UK-based contractors: Fully remote. Must work via umbrella (inside IR35)
• Denmark-based contractors: Hybrid model, 10 days/month onsite
• Background checks to be completed post-onboarding

*Rates depend on experience and client requirements