An independent consultant, database-centric application practitioner and architect totally focused on SQL Server. As a consultant he specializes in Microsoft DW/BI systems, especially in solving data quality issues and SQL Server Data Mining, and also in performance tuning and troubleshooting.

Over the past years he has been teaching and working with ISVs and Microsoft Polska premier customers. In addition to consulting and teaching advanced SQL Server classes, Marcin has been writing about SQL Server since 2003.

Marcin has held SQL Server MVP title continuously since 2006 along with such titles as MCT, MCITPro and the newest MCSE certificate.


Since 2012 – Data Platform & Business Intelligence Expert at Beside creating and delivering dedicated SQL Server courses, experience in troubleshooting various customer’s problems related to SQL Server.

Since 2009 – Microsoft Partner. External SQL Expert responsible for piloting proof-of-concept projects and teaching internal classes.

Since 2008 – BETACOM S.A. – Architect, consultant and trainer involves in design solutions based on SQL Server and related Business Intelligence technologies and troubleshooting ETL and IEM solutions based on SQL Server.

2001 – 2008 – Comp Safe Support – Microsoft Certified Trainer. Experience in conducting authorized Microsoft training since 2001. Certified training in the field of Microsoft SQL Server, ETL/EIM and BI.


MCT – Microsoft Certified Trainer MCSE – Microsoft Certified Solutions Expert: - Data Platform MCITP – Microsoft Certified IT Professional: - Database Administrator SQL Server 2005 - Database Administrator SQL Server 2008 - Database Developer SQL Server 2005 - Database Developer SQL Server 2008 - Business Intelligence Developer SQL Server 2008 - Business Intelligence Developer SQL Server 2008 MCTS – Microsoft Certified Technology Specialist: - SQL Server 2005 - SQL Server 2005, Business Intelligence Development - SQL Server 2008, Implementation and Maintenance - SQL Server 2008, Database Development - MCSA – Microsoft Certified Solutions Associate - SQL Server 2008 Core - SQL Server 2012

MCSD – Microsoft Certified Solution Developer  - For Microsoft .NET -  Microsoft Visual Studio 6.0

MCSE – Microsoft Certified Systems Engineer: Security  - Microsoft Windows Server 2003 - Microsoft Windows 2000

Books and Publications (selected)

„Microsoft SQL Server. Modelowanie i eksploracja danych” - The very first Polish book (and one of very few overall) that covers the whole cycle of data mining, from framing business problems, assessing and preparing data, building and evaluating mining models, to acting on the results. This book was prepared with cooperation with Microsoft Polska and it was used to promote SQL Server 2012 Business Intelligence Edition

„Serwer SQL 2008. Usługi biznesowe. Analiza i eksploracja danych” – 101 publication about core components of Microsoft BI platform - SSAS and Excel 2007 with Data Mining Add-in

„Serwer SQL 2008. Administracja i programowanie” - Book written with fellows MVPs (Pawel Potasinski and Damian Widera) about administering and programming SQL Server 2008

“Praktyczny kurs SQL” - course SQL language based on TSQL 2008

„SQL Server 2005 Express. Skuteczne rozwiązania” - Practical guide to SQL Server 2005Express Edition

“Transact-SQL. Czarna księga” – The ultimate Transact-SQL reference

Avoiding Data Loss” – article answering the question Kow to preven