Complex sentence: His actions lead to a confrontation wth Riva, causing Carl to walk out, with his sous-chef Tony taking over Carl's position as head of the kitchen and line-cook Martin questions his own position in the suddenly restructured kitchen.
Split into simpler sentences: His actions lead to a confrontation with Riva, causing Carl to walk out, with his sous-chef Tony taking over Carl's position as head of the kitchen. The power shift in turn makes line-cook Martin questions his own position in the suddenly restructured kitchen.