Complex sentence: In 1992, he became Chairman of the "Rossi" Company, until 1999, and between 1999 and 2004 he was Chairman of "Corporation S", a company that builds elite homes in St Petersburg.
Split into simpler sentences: In 1992, he became Chairman of the "Rossi" Company. In 1999 and 2004 he became Chairman of "Corporation S", a company that builds elite homes in St Petersburg.