 The company provides a comprehensive range of construction services, including the design and construction of a variety of buildings and civil engineering works, steel structures with a full range of electrical and mechanical engineering services.Christiani & Nielsen was established by Rudolf Christiani, a Danish civil engineer, and Aage Nielsen, a captain in the Royal Danish Navy, in Copenhagen in 1904 to build bridges, marine works, and other reinforced concrete structures.It soon established a branch in Hamburg, and after World War I, extended its operations to the United Kingdom, South America, Australia, and Africa.