Business Analyst - Back Office Migration (Broker Dealer)

As the founding entity of RAINBOW PARTNERS, Quanteam is a consulting firm specialized in Banking, Finance, and Financial Services. Through our core human values – proximity, teamwork, diversity, excellence – our 850 expert consultants, hailing from 35 different nationalities, collaborate across 13 international offices: Paris, Lyon, New York, Montreal, London, Brussels, Luxembourg, Geneva, Lisbon, Porto, Casablanca, Madrid and Singapore.Contract Type: Long-term consulting assignment with our client, Full time W2 role with QuanteamContextWe are looking for a Senior Business Analyst with strong broker-dealer operations expertise to support a large-scale back-office subledger migration from a legacy internal platform to a leading vendor solution.The consultant will serve as a key liaison between Operations, IT, Finance, and the Vendor, ensuring operational readiness, testing coverage, and comprehensive documentation throughout all migration phases.You will represent the Operations department in all conversion activities, helping to define requirements, validate workflows, and support data and process migration for cash equities, listed options, and asset servicing.Main ResponsibilitiesAct as the Operations representative across project and vendor meetingsProduce clear documentation: business requirements, testing plans, and executive summaries of key deliverablesSupport the development of the chart of accounts and accounting feed mappingsDesign and execute detailed test scripts covering:Trade capture & settlementAsset servicingRegulatory reporting (e.g. Reg Sho, short interest)Security & account mastersCash / position reconciliations (system vs clearinghouse vs ledger)Shadow output validation for accounting feedsContribute to migration strategies and operational playbooksUpdate existing operating procedures to integrate the new system.Required Skills & ExperienceStrong background in broker-dealer operations: equities, U.S. options, clearing, custodyExcellent understanding of trade lifecycles and DTCC / OCC workflows (TradeSuite, etc.)Hands-on experience in system migration / conversion projectsWorking knowledge of how OMS platforms interface with back-office and accounting systemsProficient in writing clear functional documentation and test casesFamiliarity with Broadridge Shadow or similar back-office systems is a strong asset