Giel is Associate Professor at the Graduate School of Technology Management at the University of Pretoria where he is heading the Project Management Programme. Tuition is primarily focused on the MEM (Masters in Engineering Management) and MPM (Masters in Project Management) programmes as well as various short courses to specific clients and institutions like Eskom, ABSA, Dept of Water Affairs, Denel, Habitat for Humanities, MTN, Glencore, Group 5, Anglo American, Kumba, Sasol, Exxaro, Komatiland, etc. The APPM (Advanced Programme in Project Management) was developed under his leadership. In 2009 he received an Erasmus Mundus Scholarship to teach on the Master in Strategic Project Management Programme at Heriot Watt University, Edinburgh, Scotland and in 2011 at Umea University in Sweden on the same programme. He is also a visiting scholar at the Vilnius Gediminas Technical University, Lithuania.