Title: Towards Scalable Framework for Geometry and Meshing in Scientific Computing Abstract: High fidelity computational modeling of complex, coupled physical phenomena occurring in several scientific fields require accurate resolution of intricate geometry features, generation of good quality unstructured meshes that minimize modeling errors, scalable interfaces to load/manipulate/traverse these meshes in memory and support I/O for check- pointing and in-situ visualization. While several applications tend to create custom HPC solutions to tackle the heterogeneous descriptions of physical models, such approaches lack in generality, interoperability and extensibility making it difficult to maintain scalability of the individual representations. In this talk, we introduce the component-based open-source SIGMA (Scalable Interfaces for Geometry and Mesh based Applications) toolkit, an effort to address these issues. We focus particularly on its array-based unstructured mesh representation component, Mesh Oriented datABase (MOAB) that provides scalable interfaces to geometry, mesh and solvers to allow seamless integration to computational workflows. Based on the three fundamental units consisting of 1) compact array-based memory management for mesh and field data, 2) efficient mesh data structures for traversals and querying, and 3) scalable parallel communication algorithms for distributed meshes, MOAB supports various advanced algorithms such as I/O, in-memory mesh modification and refinement, multi-mesh projections, high-order boundary reconstruction, etc. We discuss some of these advanced algorithms and their applications. Bio: Dr. Navamita Ray is a postdoctoral appointee and part of the SIGMA team at Mathematics and Computer Science Division at Argonne National Laboratory, Argonne, IL. She has been involved in research on flexible mesh data structures for mesh adaptivity as well as high-fidelity discrete boundary representation. Dr. Ray holds a Ph.D. in Applied Mathematics from the StonyBrook University, where she did graduate work on high-order surface reconstruction and its applications to surface integrals and remeshing.