The document describes several projects worked on by Antonio Carlos Siqueira between 2002-2007 as a developer and analyst. The projects involved requirements analysis, design, development and debugging of systems using technologies like Visual Studio, SQL Server, and SSAS/SSIS/SSRS. Siqueira took a lead role on the projects and optimized queries, stored procedures and OLAP cubes. The projects were for clients in various industries and involved building applications, reporting solutions and business intelligence systems.