Experience defining and validating surveillance data requirements, mappings, and lineage across orders, executions, RFQs, market data, reference data, communications, and employee data, including completeness, accuracy, timeliness, exception management, and source-to-target reconciliation controls. Experience implementing, configuring, enhancing, or supporting trade surveillance platforms such as Nasdaq SMARTS, TradingHub, or similar surveillance technologies, including hands-on work with alert logic, workflow configuration, system integration, data onboarding, testing, and production issue resolution.