Online Real Learning & Certification Courses for Working Professionals SubMastery stands for Subject + Mastery = SubMastery The growth comes with Subject Mastery, thus our tag line says - Growth with Subject Mastery. We believe every engineer in our country needs respect and growth which they truly deserve. Somehow, in our present company culture, most companies management and HR professionals are less bothered about working engineers' learning and growth. They are just treated as machines whose No. 1 work is to give the best output but without time and effort in their training and mentoring by seniors.