In June 1996, 5 builders decide to set up a private company whose goal would be the continued improvement of services offered to the population and to ensure quality health care: Groupe Radisson.
After a start-up period that witnessed numerous meetings and discussions with community partners, in July 2001, Groupe Radisson started its operations with the acquisition of its first service locations, i.e.: Ste-Anne-des-Monts, Mont-Louis, Grande-Vallée and Murdochville, in the Gaspésie region.
In January 2004, the company acquired the Mont Tremblant sector, in the Laurentides region; then, in September 2005, St-Michel-des-Saints, in the Lanaudière region. These last two acquisitions were in line with the company’s goal to spread its operations on the Québec prehospital industry scene.
In July 2006, the Pasbébiac and Bonaventure service location, located in the Gaspésie region, become part of Groupe Radisson. This last acquisition positioned Groupe Radisson both in the northern and southern sectors of the Gaspésie region. In March 2007, the company acquired the Pointe-à-la-Croix and St-Alexis sectors. One year later, in March 2008, the Grande-Rivière, Chandler and Gascon sectors joined the Group, which helped the company consolidate its position in the Gaspésie region.
With acquisitions still on its agenda, Groupe Radisson acquired, in July 2009, the Huntingdon service location, and, in November that year, the Donnacona location. The company also acquired the Montmagny service location in 2011, and this acquisition became the head office for its administrative operations.
In 2013, Groupe Radisson acquired the Waterloo service location, strengthening its presence in the Montérégie region.
In 2014, Groupe Radisson also improved its position in the Chaudière-Appalaches region by acquiring the St-Flavien service location.
In 2016, the company acted to consolidate its presence in this same region by acquiring the St-Jean-Port-Joli and Lotbinière service locations, areas adjacent to Montmagny and St-Flavien and located in the eastern and western extremities of this administrative region.