WASHINGTON, D.C.: A former top executive of German giant Siemens pleaded guilty Wednesday in the US to a massive bribery scheme to win a $1 billion contract with the Argentine government. Andres Truppel, a former financial finance officer for Siemens Argentina, admitted he had conspired to pay $100 million bribes to senior Argentine government officials to land the contract to produce national identity cards, Manhattan US attorney Preet Bharara said. The Argentine government awarded the national identity card project to Siemens in 1998. Siemens agreed in 2008 to pay $1.6 billion to the US and German authorities to resolve corrupt practices charges in connection with the case, and helped in the investigation of those charged. Truppel, 60, faces a maximum sentence of five years in prison and three years of supervised release, Bharara said.