Business Analyst

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.