The Consulting Engineering Company KALLIERGOS O.T.M. S.A. has a lead role and participation in all major infrastructure projects in Greece and a strong presence in similar projects aboard. Founded in 2004 via an internal restructure of the operating since 1965 mother Company O.T.M. Ltd, continues the tradition of offering high quality services to State Authorities, General Contractors and Private Equity Organizations. The firm is based in Athens, Greece, housed in private premises. Combining the vast record of experience and the highly qualified Engineering Staff the company has the capacity and resources to apply state-of-the-Art methods of Structural and Earthquake Engineering to projects of any size and level of complexity. In all its activities the firm implements Quality Systems conforming to ΕΝ ISO 9001:2015 certified by TÜV HELLAS (TÜV NORD) S.A.