Helsingin Energia is one of Finland's largest Energy companies and they utilize OPC solutions provided by different vendors. The new OPC UA definition enables secure data transfer in all environments and networks. This will increase the popularity of the OPC UA technology in the future, which also creates new educational needs, which can be fullfilled with expert training. Prosys organized a customized training for Helsingin Energia. A major part in the training was practical excersises, with which the participants could also achieve precious practical experience about the subjects included in the training.