Manuel Gallardo is on the HR Expert Board, is a former platinum consultant for SAP, and has been working in HR since 1994. He currently serves as an SAP HR functional architect at /NSPRO Consulting. He has taught classes on CATS since 1997 and is a regular speaker at the HR Conferences. He's worked on multiple full cycle CATS implementations and has assisted more than 70 companies with their CATS issues, and he has worked directly with the CATS Development team in Germany.

Martin Gillet, an SAP-certified HR consultant (ECC 6.0, SAP R/3 Enterprise, and 4.0B), works as a freelancer on international projects. He graduated with honors in Human Resources Management from the Belgian Haute Ecole Namuroise Catholique and has worked with SAP R/3 in the chemical, pharmaceuticals, telecommunications, banking, public sector, and oil industries. He has focused on SAP HR since 1998.