Treselle Systems provides big data strategy, architecture, product development, and project execution services to help customers gain strategic business insights from various data sources. The company uses technologies like Hadoop, Spark, Talend, and Camel to ingest, transform, and aggregate data. Treselle also has expertise in data visualization, analytics, and working with NoSQL databases. It helps clients build strong data teams and implement solutions like using OrientDB for polyglot persistence and Apache Drill for flexible querying across data stores. An example project involved cleansing and transforming healthcare data from over 4,000 sources for improved entity identification.