Business Analyst - Inside IR35 - OMS Migration

Business Analyst - OMS Migration (Back Office / Post‑Trade)

Location: City of London - 3 days per week into Office

Inside IR35: 600-650

Duration: 12-months

We're supporting a global financial services organisation on a major OMS migration programme, impacting core back‑office settlements and accounting platforms.

This role sits within a wider transformation focused on modernising post‑trade systems and ensuring operational stability, financial accuracy, and regulatory compliance throughout the migration lifecycle.

You'll play a key role in delivering the OMS migration, working across Operations, Finance, Risk and Technology to define requirements and ensure successful implementation.

Key responsibilities include:

• Eliciting and documenting business requirements, process flows and data mappings across settlement and accounting systems
• Analysing as‑is and to‑be processes, including trade settlement, netting, cash and securities movements, booking models and accounting flows
• Supporting system migration activities such as functional design, data migration, reconciliations and legacy decommissioning
• Driving UAT planning and execution, including test scenario definition, coordination and defect triage
• Supporting parallel run and post‑implementation validation to ensure data accuracy and operational control
• Ensuring all changes align with governance, risk and regulatory requirements

Experience Required

• Proven experience as a Business Analyst within back office / post‑trade environments
• Strong understanding of settlements, accounting flows and financial reconciliations
• Experience supporting OMS or large‑scale system migrations / change programmes
• Strong process mapping, data analysis and documentation skills
• Confident stakeholder management across Operations, Finance, Risk and Technology

Desirable:

• Experience with settlement or accounting platforms / post‑trade vendor systems
• Knowledge of booking models, net settlement and control frameworks
• Exposure to regulatory or audit‑driven change in financial services

This is an opportunity to join a high‑impact OMS transformation programme, working across a complex financial services environment and contributing to the modernisation of critical post‑trade systems.

If you're interested in working on large‑scale trading system migrations, please get in touch to discuss further.