Mark Mergaerts is a principal technical consultant working for Logos Consulting, a Belgian consulting company that focuses exclusively on SAP technology (BC). Before that, he worked for SAP Belgium between 1995 and 2011, giving him almost 20 years of SAP BC experience. His activities concentrate on system administration, database management, performance, upgrades (he has been upgrading SAP since the days of release 2.1), and platform and Unicode migrations. He is the co-author with Bert Vanstechelman of the SAP OS/DB Migration Project Guide and mySAP ERP Upgrade Project Guide and of the SAP NetWeaver Application Server Upgrade Guide, the first edition of the present book. Mark lives near Antwerp, Belgium, and is married with two adult children.