Wisman Djaja earns a Bachelor Degree in Technology, Production and Management Engineering in 1979 from Loughborough University, England. In 2006, he took the Executive Development program at the IMD Business School, Switzerland. He has worked for Nestle for more than 30 years. Since 2002 to 2005, Wisman is a Sales Director of PT Nestle Indonesia, from which he became Director of Supply Chain Management until 2013. Currently, Wisman is a Director of Sustainable Agriculture, Development and Procurement. He became chairman for SC Division responsible for demand forecasting, supply planning, logistics, "order to cash", as well as customer service.
As of right now, Wisman Djaja currently holds a reputable position as one of SCOPI's board member. He also takes part as a board member in another organization. Since 2015, he has contributed fully within the Cocoa Sustainable Partnership. In addition, he has also filled important positions at Yayasan IDH Indonesia since 2017 as a board member of the organization.