Prelios Integra has recently been certified for SOA OG1 class VIII, OS28 class V, OS30 class IVBIS and OS3 class II. Such certification is valid until 2017 and is granted only to Companies that, following to a technical-economic analysis of the last five fiscal years, proved to fufill all requirements to realise important public works. The certification is an important recognition, beside ISO9001:2008 certification and others certifications recently obtained by the company, proving that Prelios Integra is ready to guarantee to its clients, both in the public and private sectors, a reliable partner focused on the continuous improvement of its services.