Until January 2015 he was CEO and President of the Executive Committee of the network operator Elia, a listed company, where he held various management positions since joining it in 2001. Before that he worked for 11 years as Senior Advisor Strategy Direction with the energy company Electrabel.
Vandermeiren has occupied various directorships with among others Febeg (Federation of Belgian Energy Companies) and the Federation of Belgian Enterprises. He is also co-founder of the Belgian sustainability platform The Shift, as well as co-investor in Qpinch, which generates energy from waste heat, and in Uest, which markets the Zembro personal alarm. Finally Vandermeiren is a director of the Vascobelo Group, an upmarket Belgian coffee brand with Antwerp as its home port.