Sage 100 (MAS 90/200) Master Developer Certification - What Does This Mean to You?While Sage 100 (MAS 90/200) fills the broad requirements of most businesses, occasionally additional functionality is required to meet unique needs. As a Sage 100 (MAS 90/200) Master Developer, DWD is able to assist with the development of needed software customizations to help expand Sage 100 (MAS 90/200) functionality for your business. DWD Technology Group has received the Master Developer Certification from Sage Software for version 4.x of Sage 100 (MAS 90/200). With over 8 years of Master Developer Certification, the consultants at DWD continually expand their software knowledge is order to provide you with the finest support services available. For more information about customizing your Sage 100 (MAS 90/200) software, please contact David Overholt, Project Manager at 800.232.8913.