This document summarizes Grzegorz Kolpuc's work developing search and analytics solutions at Thomson Reuters using the Elastic Stack. It describes: 1. Developing distributed search engines using Elasticsearch for full-text search, filtering, caching and plugins. 2. Creating the Marvel tool for debugging and monitoring Elasticsearch clusters. 3. Implementing cross-cluster search, analytics for aggregation, grouping and metrics, as well as geo-location features like distance filtering. 4. Using scripting for custom scoring, filtering and analytics beyond standard queries. 5. Developing alerting to notify users of data changes through Elasticsearch percolation.