Adecco was founded in 1996 with the merger of Swiss company Adia Interim and French company Ecco, creating a company with around 2,500 branches and an annual revenue of 5.4 billion euros. The year 2000 saw significant expansion for Adecco through their acquisition of Olsten Recruiting, boosting their total revenue of 11.6 billion euros and turning them into the largest recruitment company in the U.S. at the time. Since then, a combination of acquisitions and organic growth has enabled Adecco to expand their operations across the globe, resulting in a company which generated nealry 20 billion euros in revenue in 2020.
Presently, the Adecco Group operates under a number of different brands worldwide, with the most prominent being: Adecco Staffing, Euro Engineering, Modis, Spring Professional, Badenoch & Clark, Pontoon, General Assembly, Vettery, YOSS , Adia and Lee Hecht Harrison. Each of these brands has a different focus; for example Adia focuses on the hospitality, catering and events industry, while Modis focuses on IT, engineering and life sciences. Overall, the majority of the Adecco Group’s revenue generates from the Adecco brand.