Knowledge Engineer (Social Cognitive Computing Department), IHPC

Job Purpose: The Knowledge Engineer will be responsible for deg, constructing, and maintaining knowledge graphs derived from heterogeneous enterprise documents. The role involves leveraging Large Language Models (LLMs) for knowledge extraction, ontology-driven structuring, and question answering over knowledge graphs to support intelligent search, reasoning, and decision-making systems. Key Responsibilities: Leverage LLMs to extract structured knowledge (entities, relations, attributes) from unstructured and semi-structured documents such as: Maintenance manuals Product design documents Troubleshooting guides Lessons learned reports Process documents in multiple formats, including Word, PDF, PowerPoint, and Excel. Design, construct, and maintain knowledge graphs, including: Schema and ontology design Entity and relationship modelling Data normalisation and validation Implement and manage knowledge graph storage using graph databases such as Neo4j and GraphDB. Develop LLM-powered question answering and interaction pipelines over knowledge graphs, enabling: Natural language queries Context-aware and explainable responses grounded in structured knowledge Collaborate with domain experts and stakeholders to refine ontologies, extraction logic, and use cases. Job Requirements: Strong understanding of ontology design, knowledge graph modeling, and semantic data representation. Proficiency in Python, with experience building data processing and NLP pipelines. Solid understanding of prompt engineering and LLM-based workflows. Hands-on experience working with LLMs, including both: Closed-source models (e.g., GPT-based APIs) Open-source models (e.g., LLaMA, Qwen, etc.) Experience with graph databases, particularly Neo4j and/or GraphDB. Experience in information extraction, document understanding, or NLP pipelines. Familiarity with RDF, OWL, SPARQL, or Cypher is a plus. Experience integrating LLMs with structured knowledge sources (e.g., KG-augmented QA, RAG with graphs). Strong analytical and problem-solving skills, with the ability to translate unstructured information into well-defined data models. Ability to work independently while collaborating effectively within a multidisciplinary team. Good communication skills to engage with technical and non-technical stakeholders. Demonstrated willingness to continuously learn and keep up with advances in LLMs, NLP, and knowledge engineering. The above eligibility criteria are not exhaustive. A*STAR may include additional selection criteria based on its prevailing recruitment policies. These policies may be amended from time to time without notice. We regret that only shortlisted candidates will be notified.