Established in 1971 by a partnership of Ir. Hadi Husni Mantjanegara, Ir. Rismantojo, and Ir. Sawarso Wignjosajono, PT Soilens has been trusted by numbers of domestic (private and government) and overseas clients, both contractors and project owners to perform soil investigations, survey, construction, supervision, and other engineering services. Our projects portfolio covers more than 2,500 projects.