Complex sentence: In 2006 McManus was approached by some members of the band The Birthday Massacre to help with some business problems and so in early 2007 McManus began managing the band himself and since then they have become one of the top Industrial Goth bands in the world.
Split into simpler sentences: In 2006 McManus was approached by some members of the band The Birthday Massacre to help with some business problems and so in early 2007 McManus began managing the band. Since then they have become one of the top Industrial Goth bands in the world.