Our relationship with each customer is sustainable and long-lasting. Together we can build trust and lifelong relationship. Every business for us is a living organization and we have the best ex-perts for every problem that arises and for every need that is born.
Our reputation, which spreads by word of mouth, and the certifications and awards we keep re-ceiving, generate a sense of increased responsibility and respect.
Since 2001, the Athens International Airport “Eleftherios Venizelos” has entrusted IOS with the cleaning services of the buildings and visitors-passengers areas - the first and last impression visitors have from and to Athens.
Since 2012, our team of engineers and technicians support the day-to-day operation of NN Hellas headquarters building and the preventive and maintenance of all building systems