Siemens Gamesa Renewable Energy S.A., formerly Gamesa Corporación Tecnológica S.A. and Grupo Auxiliar Metalúrgico S.A., is a Spanish-German wind engineering company based in Zamudio, Biscay, Spain. In Spain, the company has two other main sites one in Madrid and the other one in Sarriguren (Navarre). The Services Commercial Office is located in the Parque de la Innovación de Navarra in Sarriguren. It manufactures wind turbines and provides onshore and offshore wind services. It is the world's second largest wind turbine manufacturer.