Marc Houalla began his career in 1985 as a research engineer at Transport Canada (Directorate of the Canadian Civil Aviation) in Ottawa. He then joined French Civil Aviation Authority (DGAC) in 1987, where he successively held the positions as the engineer responsible for business and technical service and air navigation in Paris, then as head of the technical and finance department of SEFA (the aeronautical training service) in Paris, then at Muret (in the department of Haute Garonne).
From 1996 to 1998, he worked for SOFREAVIA (Counselling and engineering agency for air transport) as a consultant on economic and financial affairs.
In 1998, he joined DGAC as Director of Operations in the Civil Aviation South Division (DAC/South) in Toulouse. In 2003, he took charge of civil aviation in the Provence region, and Director of the main airport of Marseille Provence. Then in 2006, he headed the new South-Southeast Air Navigation Service in Marseille. In December 2006, he was appointed head of SEFA.
Marc Houalla became the Director of the National Civil Aviation School in November 2008. From November 2008 to January 2011, he combined both positions at ENAC and SEFA.
On 15 October 2017, Marc Houalla was appointed Managing Director of Paris-Orly airport. As part of his duties, Marc Houalla will work in coordination with the Operations Division at Groupe ADP.