Mainframe Performance & Scalability SME
London (Hybrid) | 6-Month Rolling Contract | Inside IR35
We are supporting a major financial services organisation seeking a highly experienced Mainframe Performance & Scalability SME to undertake a strategic assessment of a large-scale IBM Mainframe environment supporting critical pension administration services.
This is a senior consulting engagement focused on identifying performance bottlenecks, scalability constraints and future growth risks across IBM Z infrastructure, z/OS, Db2 and CICS environments.
You will work closely with architecture, engineering and operations teams to assess current platform performance, analyse capacity trends and provide evidence-based recommendations to support future business growth.
Key Responsibilities
- Conduct end-to-end performance and scalability assessments across IBM Mainframe platforms.
- Analyse workload behaviour across z/OS, CICS, Db2 and batch processing environments.
- Identify current and future capacity constraints, utilisation trends and performance risks.
- Investigate increases in CPU and MSU consumption, including impacts from IBM Z16 upgrades and infrastructure changes.
- Assess workload attribution, licensing implications and optimisation opportunities.
- Lead technical workshops and challenge assumptions through data-driven analysis.
- Produce clear recommendations and prioritised remediation roadmaps.
Essential Skills & Experience
- IBM Mainframe Performance Engineering
- z/OS Performance Analysis
- Db2 for z/OS Performance & Scalability
- CICS Performance Tuning
- RMF / SMF Analysis
- WLM Policy & Capacity Management
- MSU Consumption Analysis
- Capacity Planning & Forecasting
- Batch Workload Optimisation
- Application & Database Performance Troubleshooting
Desirable Experience
- IBM Z16 migrations or upgrades
- TLS, System SSL and cryptographic workload analysis
- CPACF, Crypto Express and ICFS
- zIIP utilisation and offload optimisation
- Observability and APM tooling including:
- OMEGAMON
- BMC MainView / AMI
- Dynatrace
- Datadog
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Mainframe Performance SME employer: McGregor Boyall
Join a leading global Investment Management firm in London, where you will thrive in a dynamic hybrid work environment that fosters collaboration and innovation. With a strong focus on employee growth, the company offers competitive salaries, generous bonuses, and comprehensive benefits, alongside opportunities to take ownership of impactful regulatory initiatives. Experience a supportive work culture that values strong stakeholder relationships and encourages professional development, making it an ideal place for those seeking meaningful and rewarding employment.
