Knowledge Graph Scientist

A*STAR - Agency for Science, Technology and Research; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

A*STAR's Sustainable Systems and Devices group is seeking a Knowledge Graph Scientist to advance ontologies, reasoning, and LLM-KG integration for remanufacturing platforms. You will design core ontologies, develop multi-hop reasoning, and prototype GraphRAG pipelines while collaborating with engineers, scientists, and industry partners.

This hands-on research role emphasizes publishing, prototype development, and shaping the KG program's direction across EV battery, aerospace, and manufacturing

Qualifications

• PhD in Computer Science, AI, or related engineering field.
• Demonstrated track record of independently securing competitive research grants, funding awards, or industry-sponsored projects.
• At least 2 years of relevant post-doctoral or industry research experience, preferably in industrial or manufacturing knowledge domains.

Responsibilities

• Design and govern core ontology for parts, processes, regulations, and lifecycle states across domains.
• Develop and evaluate multi-hop reasoning, rule-based inference, and neuro-symbolic approaches.
• Research GraphRAG pipelines and LLM-to-KG extraction to populate graphs from documents and logs.
• Develop cross-domain ontology alignment to unify terminology across data sources.
• Explore temporal KG structures to model evolution of part conditions and states.
• Lead research proposals, roadmapping, and identify new KG opportunities.
• Collaborate with KG Engineer to deploy prototypes into production-grade graphs.
• Prepare documentation, reports, and presentations; publish findings at venues.

Skills

Python

Ontology design

RDFS/OWL/SKOS

SPARQL/Cypher

Knowledge graph embeddings

RAG integration

Neuro-symbolic AI

Temporal KG

Multi-hop reasoning

NER/Relation extraction

Education

PhD in Computer Science / AI

Tools

Neo4j

Stardog

SPARQL

Cypher

Job description

Knowledge Graph Scientist

(Group: Sustainable Systems and Devices)

About The Role

We are seeking a motivated and research-driven Knowledge Graph Scientist to join our R&D team, focused on building the knowledge foundation for our remanufacturing platform. The role centres on designing ontologies, developing reasoning methods, and integrating large language model (LLM) technologies with knowledge graphs to support intelligent decision-making across the product lifecycle.

Job Description

Knowledge Graph Scientist

(Group: Sustainable Systems and Devices)

About The Role

We are seeking a motivated and research-driven Knowledge Graph Scientist to join our R&D team, focused on building the knowledge foundation for our remanufacturing platform. The role centres on designing ontologies, developing reasoning methods, and integrating large language model (LLM) technologies with knowledge graphs to support intelligent decision-making across the product lifecycle.

You will work closely with a multidisciplinary team of engineers, domain scientists, and industry partners to develop knowledge graphs in different domains such as EV battery, aerospace, and manufacturing remanufacturing contexts. This is a hands-on research role with expectations to publish, prototype, and lead the scientific direction of the KG programme.

Roles and Responsibilities

• Design and govern the core ontology covering parts, processes, regulations, and lifecycle states in EV battery, aerospace, and manufacturing domains, ensuring methodology scalability regardless of the industry domain
• Develop and evaluate multi-hop reasoning methods, rule-based inference, and neuro-symbolic approaches that enable the system to derive new knowledge from existing graph facts
• Research and prototype GraphRAG pipelines and LLM-to-KG extraction methods that automatically populate the graph from technical documents, inspection reports, and sensor logs
• Develop cross-domain ontology alignment methods to unify terminology and schemas across data sources (e.g. engineering and supply chain), including handling conflicting industry standards
• Research temporal knowledge graph structures that model how part conditions and states evolve across the remanufacturing lifecycle, enabling historical reasoning and predictive inference
• Lead and contribute to research proposal development, technical roadmapping, and capability-building initiatives that align with industry needs and organisational strategy; proactively identify emerging technology opportunities and define new research directions for the KG programme.
• Collaborate with the KG Engineer to operationalise research prototypes into production-grade graph systems
• Prepare technical documentation, research reports, and presentations for internal and external stakeholders
• Publish findings at relevant research venues or domain-specific manufacturing and sustainability conferences

Job Requirements

Technical Skills

• Proficiency in Python, with experience in graph database systems (e.g., Neo4j, or Stardog)
• Strong foundation in knowledge representation and reasoning, including ontology design (OWL, RDFS, SKOS) and graph query languages (SPARQL, Cypher)
• Deep understanding of knowledge graph embedding methods (e.g., TransE, RotatE, ComplEx) and link prediction techniques
• Experience with LLM integration for knowledge tasks: Retrieval-Augmented Generation (RAG), information extraction, or fine-tuning language models on technical text
• Familiarity with neuro-symbolic AI approaches combining neural learning with logic-based reasoning
• Proficiency in one or more of the following areas:
  • Temporal knowledge graphs and evolving graph structures
  • Multi-hop reasoning and path-based inference
  • Named entity recognition and relation extraction from technical documents
  • Knowledge graph completion and missing link prediction

Bonus Skills (Preferred But Not Required)

• Familiarity with industrial or manufacturing data formats (BOMs, maintenance records, inspection schemas, ISO standards)
• Experience with digital twin frameworks or manufacturing informatics platforms

Qualifications

• PhD in Computer Science, Artificial Intelligence, or a related engineering field, with a focus on knowledge representation, semantic web, or graph-based machine learning
• Preferred: Demonstrated track record of independently securing competitive research grants, funding awards, or industry-sponsored projects.
• Preferred: At least 2 years of relevant post-doctoral or industry research experience, preferably with exposure to industrial or manufacturing knowledge domains