This book constitutes the refereed proceedings of the Second Annual International Symposium on Information Management and Big Data, SIMBig 2015, held in Cusco, Peru, in September 2015, and of the Third Annual International Symposium on Information Management and Big Data, SIMBig 2016, held in Cusco, Peru, in September 2016. The 11 revised full papers presented were carefully reviewed and selected from 70 submissions. The papers address issues such as Data Science, Big Data, Data Mining, Natural Language Processing, Bio NLP, Text Mining, Information Retrieval, Machine Learning, Semantic Web, Ontologies, Web Mining, Knowledge Representation and Linked Open Data, Social Networks, Social Web and Web Science, Information Visualization, OLAP, Data Warehousing, Business Intelligence, Spatiotemporal Data, Health Care, Agent-based Systems, Reasoning and Logic, Constraints, Satisfiability, and Search.