After getting his Master's degree in Chemical and Materials Engineering at the Louvain School of Engineering (UCL) in 2012, David-Henry started working for PolyOne company as an Application Development and Technical Service Engineer.

He has been responsible for the development of tailor-made coloured polymers solutions and the technical support especially of customers from the packaging market using different polymers manufacturing processes.

In 2017, he joined INEOS Olefins and Polymers Europe at the Technology Centre in Brussels as a Technical Service and Product Development Engineer to support marketing and sales through the technical support to customers of Caps & Closures market, the development of specialty materials for this application and the close collaboration with injection machine manufacturers and mould makers.