Our Certificate IV in Interior Decoration MSF40122 will help you turn your individual style into an exciting and creative career. Styling a space is more important than ever in this Instagram age and the interior design industry is growing rapidly. Job opportunities in interior design have almost doubled since 2014. If you have an eye for detail and a taste for trends, you could use this qualification to establish your own interior design business or provide design consulting for high-end commercial and domestic clients.