Hartanto is a committer to the Open Mainframe Project's COBOL Programming Course, helping to improve the content of the course with various addition and assisting new learners to incorporate COBOL as a part of their tech toolkit. Additionally, as one of the firsts who is recognized as an IBM Z Community Influencer, he helped individuals to start their journey into the world of IBM Z and LinuxONE through session presentations on various mainframe-related conferences and discussions in many of the mainframe community.