Digital twin is a valuable tool for the active training of engineers at both academic and professional levels. This is even more important if learners can experience any safe or unsafe scenarios on the safe environment of an accurate simulator combined with the systematic collaborative applications. This paper introduces a learning platform that is designed in compliance with ISO 10015 to be used following the individual initiatives or organizational competency management programs. The curriculum addresses the needs and expectations of Industry 4.0 engineers who should master not only the specialized subjects relevant to their discipline but also have a good grasp on system thinking, system engineering and complexity management skills. This active learning platform is called ADEPP Skill 4.0 and provides collaborative learning workspaces on a web-based operator training simulator (OTS) which interoperate with the SharePoint application.