Bert Vanstechelman Bert Vanstechelman is a Partner and principal technical consultant at Expertum. He has more than 20 years of experience in SAP technical consulting, covering countless SAP versions in combination with all kinds of databases and operating systems supported by SAP. Bert specializes in platform migrations, SAP release upgrades, and SAP HANA conversions. Bert is the founder of Logos Consulting, now a part of Expertum. Bert is a member of the board of advisors of the SAP Professional Journal. He is the author of “SAP HANA Implementation Guide” and co-author of “Securing S/4HANA”, both published by Espresso Tutorials. He is also the co-author, with Mark Mergaerts, of the following SAP PRESS books: “Upgrading SAP”, “SAP NetWeaver Application Server Upgrade Guide”, “The OS/DB Migration Project Guide”, and the “mySAP ERP Upgrade Project Guide”. He can be contacted at firstname.lastname@example.org.