Graduated from the Mohammedia Engineering School (EMI), Morocco, he began his career in 1982 at Office Chérifien des Phosphates (OCP) where he has held several executive positions, including Director of the Mines Division and member of the Executive Committee of the OCP Group. In 2004, he was named Director General of the Customs and Indirect Taxes Administration. In parallel, Mr. Zaghnoun was elected in 2007 Vice-President of the World Customs Organization (WCO), President of the Organization for the MENA region, and in 2008 he was also elected Chairman of the Audit Committee of the WCO. In 2010, he occupied the post of General Director of the Directorate General of Taxes. From 2015, he is Director General of Caisse de Dépôt et de Gestion (CDG)