Over a span of some 50 years he completed over 60 major projects, constructing railways, roads, bridges, public buildings, and civic facilities.
[6] In the aftermath of World War I and the Union of Transylvania with Romania, Radu helped build new roads and railways across the Carpathian mountain passes, the most important one being the Târgu Ocna–Comănești–Palanca rail line.
[1][7] Named in 1887 chief of civil works for the city of Bucharest, he built in the next two years an underground water collection station in Bragadiru, feeding into a filtration unit in Grozăvești.
[9] In 1906–1910 he supervised the construction of the Palace of the Ministry of Public Works [ro], which was designed by architect Petre Antonescu.
[10][8] With chief architect Dimitrie Maimarolu, engineers Anghel and Paul Saligny, and his son, Mircea Radu, he built the Palace of the National Military Circle in downtown Bucharest.