ESSA (Angola) Training Kwanda Logistical Support logistical support, Kwanda field MSTelcom telecommunications Sodimo real estate management SonAir oil and gas industry air transport service Sonangol P&P Oil exploration Sonagas Natural Gas Exploration Sonadiets corporate infrastructure Sonamer oil recovery; deep drilling Sonamet petroleum platform manufacturing; metal structure fabrication Sonangol Distribuidora downstream petroleum products including gasoline/petrol Sonangol Shipping maritime crude oil transport Sonangol USA, located in Houston, Texas Sonaship maritime petroleum product transport Sonasurf offshore oil work logistics Sonatide offshore oil work logistics Sonawest seismic data service Sonils Logistical Support logistical support http://www.sonils.co.ao/ Sonangol Starfish Brasil P&P Oil exploration