For more than 30 years I’m active in the field of industrial networks, as a software-engineer, user, trouble-shooter, machinebuilder, teacher and author. Since then, than 250 articles have been published in the trade-press, and several books. In cooperation with Mikrocentrum (www.mikrocentrum.nl) I teach about industrial networks, cybersecurity (IEC-62443), Ethernet, Modbus and others.