Skincare, hair styling, nail, and makeup are some of the most common services cosmetologists perform. Cosmetology is in high demand and offers a wide range of options to specialize in. Generally, cosmetologists are required to complete a certain amount of hours of training before becoming licensed or certified. In 2012 there were over a million beauty salons and spas operating in the US, according to the Professional Beauty Association. Also, check out our cover letter samples, job descriptions and other resources.