She set up a successful foundry business in Ghent and later introduced a desalinisation project and early solar panels in the first hotel on Sal Island in Cape Verde.
Her mother ran a business supplying copper instruments in the city centre and her father Arthur Massart was the Belgian representative for a French metal company.
She remained in close contact with the AIBr throughout her life, donating large sums of money to various relief funds, especially during the Second World War.
[7] Whilst bringing up her young family, Massart also set up and managed her own successful company, the Cupro Foundry, working with non-ferrous metals.
[1] In retirement, Marguerite Massart-Vynckier and her husband travelled to warmer countries during the winter months, in search of a climate better suited for her asthma.
Cape Verde allowed SAA to overfly and land, and became a centre of activity for the airline's flights to Europe and the United States.
[8][9] The Vynckier family gradually expanded the air crew accommodation into a tourist hotel, which was initially powered by alternative energy sources.
[1] A French language technical college Institut de Mécanique et d'Électricité Marguerite Massart in Brussels is named in her honour.