Ir. Darmawan Mangunkusumo was a senior Indonesian official at the Ministry of Trade and Industry who, in May 1952, accompanied the minister Sujono Hadimoto on an inspection tour of the oil enterprises in Atjeh on Sumatra.
Source
Oostkust van Sumatra-Instituut Mededeling No. 37: Deli-Figuren uit de jaren 1950 t/m 1952, compiled by Ir. F. J. J. Dootjes (Amsterdam, 1953).