Complex sentence: A few years later he was founder of the "Firma Sundheim y Doetsch" in Huelva (1871) with his compagnon Wilhelm Sundheim and in 1873 director of the Rio Tinto Company Limited, (Las Minas de Río Tinto), in Huelva.
Split into simpler sentences: A few years later he was founder of the "Firma Sundheim y Doetsch" in Huelva (1871) with his compagnon Wilhelm Sundheim. In 1873 Doetsch was the director of the Rio Tinto Company Limited, (Las Minas de Río Tinto), in Huelva.