Knowledge Graph Engineer

TheCenter for Geospatial Solutions (CGS) is a self-sustaining nonprofit enterprise. Founded to help bridge the gap between policy and practice, our mission is to enable people and the planet to meet the pace of change by expanding access to new technologies that power more sustainable and equitable outcomes.We are a fully remote team of award-winning professionals with decades of applied expertise and end-to-end GIS capabilities. By embracing whole-system thinking and state-of-the-art technology, we enable partners across public, private, and nonprofit sectors to tackle complex, real"‘world challenges"”like housing affordability, ecosystem conservation, water management, and sustainable infrastructure"”with greater clarity.Our work liberates and connects key information, creates nuanced pictures of complex situations, and makes data easier to use, understand, and act on. We use tools like satellite data and artificial intelligence to deliver insights for impact.At CGS, we believe that technology can be a tool for positive change. We are dedicated to building a diverse team that represents the communities and systems we live and work in. If you're excited about this role but don't meet every listed qualification, we encourage you to apply. We value potential, curiosity, and lived experiences, and know a more inclusive team makes us a stronger organization.About the Lincoln InstituteCGS was established in 2020 at the Lincoln Institute of Land Policy which seeks to improve quality of life through the effective use, taxation, and stewardship of land. A nonprofit private operating foundation whose origins date to 1946, the Lincoln Institute researches and recommends creative approaches to land as a solution to economic, social, and environmental challenges. Through education, training, publications, and events, the Lincoln Institute integrates theory and practice to inform public policy decisions worldwide and has office locations in Cambridge, Massachusetts; Washington, DC; Phoenix, Arizona; and Beijing, China.Position OverviewThe Center for Geospatial Solutions is seeking a Knowledge Graph Engineer to serve as a lead technical contributor to the national Geoconnex water data indexing system, working in close collaboration with the Associate Director for Technology and software development team.This role will contribute directly to the Internet of Water (IoW), a bold, coalition"‘led effort to improve water data sharing to fundamentally transform water management. Since 2022, CGS has served as the official home of the IoW Coalition, advancing this shared vision by developing and promoting new tools and best practices that strengthen the nation's water data sharing systems, in partnership with public agencies, nonprofit organizations, and the private sector.The ideal candidate will have deep expertise in semantic web technologies, water domain ontologies, and geospatial data systems, with a passion for advancing open data infrastructure that serves federal, state, and local stakeholders.Reporting to the Associate Director for Technology for the Internet of Water, the Knowledge Graph Engineer will be responsible for advancing the technical capabilities of the Geoconnex knowledge graph, integrating cutting"‘edge AI interfaces, and optimizing spatial query performance across heterogeneous water datasets. They will bring expertise in ontology development, semantic web standards, and water informatics while playing a critical role in scaling the Geoconnex system to serve as the foundational infrastructure for national water data.What You Will DoTechnical LeadershipDesign and implement ontological frameworks for water and geospatial data integration, building on existing standards and community best practicesArchitect and deploy large language model interfaces to the Geoconnex knowledge graph, enabling natural language querying and data discoveryOptimize spatial query performance and develop advanced geospatial indexing strategies for water"‘related features and datasetsProject DeliveryCollaborate with federal partners (USGS, USBR, USACE, EPA) and state agencies to integrate diverse water datasets into the Geoconnex reference feature collectionDevelop and maintain automated data ingestion pipelines for state streamgages, reservoirs, wells, and other critical water infrastructureSupport knowledge graph snapshot distribution systems and integration with academic platforms like NSF Proto-OKNTechnology Infrastructure and Data ManagementDevelop reverse geocoder services and embeddable spatial search capabilities for applications requiring Geoconnex featuresImplement cross"‘linking capabilities with NSF OKN and other federal knowledge graph initiativesEnsure system reliability and performance against established service level agreementsUnder the direction of the Associate Director for Technology, design and implement enhancements of the Geoconnex knowledge graph architecture, ensuring scalable performance for real"‘time graph queriesUnder the direction of the Associate Director for Technology, implement the Semantic Accessibility Layer framework to reduce technical barriers for data provider participationTeam and Stakeholder EngagementMentor junior developers and data scientists working on Geoconnex"‘related projectsCoordinate technical activities across the broader Internet of Water Coalition communityRepresent CGS technical capabilities in stakeholder meetings and collaborative planning sessionsQualificationsWho You Are:You get energy from solving messy, meaningful problems alongside smart, mission"‘driven collaborators. You're comfortable navigating change, curious about new tools and ideas, and excited to stretch your skillset when the work calls for it. You bring creativity, adaptability, and a sense of possibility to everything you do, and you're not afraid to try, learn, and try again.What You Will Need:Master's degree in Computer Science, Geoinformatics, or related field, or equivalent professional experienceMinimum 5 years of experience in semantic web technologies, knowledge graph development, and ontology engineeringProficiency in RDF, SKOS, SPARQL, OWL, SHACL, and semantic web frameworksExperience creating or extending ontologies and managing their lifecycle for domain specific usage across clientsStrong background in geospatial data processing, spatial databases, and GIS technologiesExperience with large language model integration, vector databases, and AI"‘driven query interfacesProgramming proficiency in PythonUnderstanding of DevOps practices and cloud infrastructureHelpful Experience (Nice to Have):Familiarity with water domain ontologies and hydrologic data standards (HY Features, WaterML, ODM2, etc.)Familiarity with entity resolution concepts and toolsFamiliarity with water data systems, monitoring networks, and federal water data standardsExperience with USGS data systems, National Hydrography Dataset, and federal water data workflowsKnowledge of state and local water management practices and regulatory frameworksFamiliarity with IoW Coalition initiatives and community governance modelsExperience working with CUAHSI, or other academic water and geospatial data interoperability initiativesBackground in hydrologic modeling, water resource management, or environmental data systemsHow to applyengineering Web Ontologies Water Knowledge Graph SemanticsMetadataPublished: Friday, September 26, 2025 02:05 UTCLast updated: Friday, September 26, 2025 02:05 UTC #J-18808-Ljbffr

Created: 2026-04-20