Semantic Layer Engineer

About MasterControl: MasterControl Inc. is a leading provider of cloud-based quality and compliance software for life sciences and other regulated industries. Our mission is the same as that of our customers to bring life-changing products to more people sooner. The MasterControl Platform helps organizations digitize, automate and connect quality and compliance processes across the regulated product development life cycle. Over 1,000 companies worldwide rely on MasterControl solutions to achieve new levels of operational excellence across product development, clinical trials, regulatory affairs, quality management, supply chain, manufacturing and postmarket surveillance. For more information, visit . Role Design and own a governed semantic layer and procedural query system that enables AI agents to reliably converse with enterprise data. Build the bridge between user intent → structured queries → reproducible results, ensuring all interactions are accurate, explainable, and deterministic. Responsibilities Define canonical entities, relationships, metrics, and hierarchies Enforce consistent business definitions across systems Model join paths, grain, and aggregation rules Create versioned, reusable metric definitions Resolve conflicting logic across teams Ensure correctness across all query combinations Design APIs for filtering, aggregation, grouping, and joins Enable agents to operate via predefined semantic procedures, not raw SQL Map intent → validated query plans Support systems where users ask questions in natural language Ensure responses are grounded in: Semantic layer definitions Deterministic execution paths Control how queries are constructed: Enforce valid joins and filters Prevent ambiguity and incorrect aggregations Inspect and optimize generated SQL Maintain traceability fr