DB-Hill International-Louis Berger consortium to provide consulting for Mumbai Metro Line 4 August 10, 2017 | Asia Pacific Company News A consortium comprising DB Engineering and Consulting GmbH, Hill International and Louis Berger SAS has secured the General Consultant (GC) services contract for Line 4 of the Mumbai Metro. Line 4 w... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password