Very good knowledge of the host country language is no longer sufficient today. You must have a good understanding of local habits and go beyond cultural gaps that may exist between business actors of different backgrounds. - Serge J. Massat Massat Consulting Group is a consulting and CPA firm with offices in New York, Mexico, Miami, Montréal, Paris and Luxembourg. At Massat, we are the link that enables you to erase cultural and technical barriers in the areas of accounting, taxation and finance. We guide foreign investor looking to set foot in the United States and Mexico, and understand local customs and ways of working.