Since 1992, he was been a member of the software Design Control Group (DCG) for AS/400 and iSeries. As a member, and later the leader, of the DCG team, his areas of responsibility have included new and changed CL commands and software release-to-release compatibility. For V5R1, he coordinated the addition of two graphical user interface (GUI) CL command prompters, one in iSeries Navigator and the other in iSeries Access for Web. As the CL Architect, he has worked on revitalizing the CL language on iSeries.