Stephen Darcy
Senior Ontologist @Philip Morris International
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WORK HISTORY
Senior Ontologist @Philip Morris International
I provide strategic leadership for PMI’s enterprise semantic layer, ensuring strategic alignment, quality assurance, and lifecycle governance for knowledge models that underpin interoperability, compliance, and automation at scale. My role focuses on setting standards, defining validation frameworks, and driving governance for ontologies, taxonomies, and metadata models across the organisation.Key Responsibilities & Impact:Semantic Layer Strategy: Define and evolve PMI’s semantic layer architecture to enable consistent, interoperable data models across domains.Standards & Governance: Establish global standards for ontology and taxonomy design, including alignment policies, naming conventions, and competency question frameworks.Validation & QA: Develop SHACL-based validation rules and implement quality assurance processes for semantic assets.Tooling & Infrastructure: Select and govern enterprise tools (e.g, TopBraid EDG), and oversee CI/CD pipelines for ontology deployment.Lifecycle Management: Implement governance boards and processes for versioning, change control, and continuous improvement.Thought Leadership: Share insights and best practices through LinkedIn articles and internal knowledge forums, positioning PMI as a leader in semantic technologies.Recent Deliverables:Enterprise ontology governance framework and validation standards.Strategic alignment of ESG, BOM, and legal ontologies with PMI’s data architecture.Enhanced semantic search and metadata models to support compliance and reporting.
EDUCATION
Plymouth Marjon University
Degree, Modern History
University of West London
PostGrad, Information Management
University of West London
Master's degree, Library Science
SKILLS
ABOUT STEPHEN DARCY
Ontology & Taxonomy Leader | Knowledge Architect | Insight StrategistWith over 30 years of experience designing and delivering cutting-edge ontology, taxonomy, and information architecture solutions, I help global organisations transform complex data into actionable insight. From semantic search and metadata modelling to AI-driven classification and knowledge management, I build the frameworks that power smarter decisions and better customer experiences.I’ve led award-winning taxonomy transformations, built enterprise ontologies for Fortune 500s, and architected knowledge systems across sectors—from life sciences and finance to e-commerce, publishing, and government. Whether it’s automating ESG reporting, enhancing platform safety, or enabling FAIR data practices, I bring a strategic, hands-on approach to every challenge.
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