Experience in LCA, process modeling, or closely related areas; Extensive experience in developing and deploying software using Python and LLMs; Extensive experience in interacting with sponsors and external collaborators; Experience in leading projects and tasks, tracking project progress, and directing junior staff; Expertise in topics related to process modeling and energy, resource, and environmental analysis of energy systems and/or materials and product systems; Excellent skills in written and oral communication to effectively interact with sponsors, collaborators, and internal team members; A successful candidate must have the ability to model Argonne's Core Values: Impact, Safety, Respect, Integrity, and Teamwork. The Researcher will work with members of the LCA and Technology Assessment Department to advance and expand the next generation GREET software, design modeling architecture and develop source codes for key GREET modeling functionalities, improve and expand the current data schema to advance data curation techniques for updating and expanding the extensive GREET database, and develop and deploy new web-based interfaces and modules.