Dejan Sarka–MCP (Microsoft Certified Professional), MCDBA (Microsoft Certified Database Administrator), MCT (Microsoft Certified Trainer), SQL Server MVP, Solid Quality Learning Mentor–is a trainer and consultant working for many Certified Partners for Learning Solutions (CPLS) centers and development companies in Slovenia and other countries. In addition to providing professional training, he continuously works on online transaction processing (OLTP), OLAP, and Data Mining projects, especially at the design stage. He is a regular speaker at some of the most important international conferences, such as TechEd, PASS, and MCT. He is also indispensable at regional Microsoft TechNet meetings, the NT Conference, which is the largest Microsoft conference in Central and Eastern Europe, and other events. He is the founder of the Slovenian SQL Server Users Group. Dejan Sarka also developed two courses for Solid Quality Learning: Data Modeling Essentials and Data Mining with SQL Server 2005.