As a painter, Singley exhibits with the John Douglas Cline Gallery of Phoenix, the Ratcliff Williams Gallery of Sedona, and the Michael Collier Gallery of Scottsdale. Outside Arizona he exhibits with Chemers of Newport Beach, California; Miranda Galleries of Laguna Beach, California; Marylin Wilson Gallery of Birmingham, Alabama; Windsors of Dania, Florida; and J. Richards Gallery of Engelwood, New Jersey.

Singley takes his major inspiration from the first French Impressionists. He cites Monet (especially at Giverny), Pissarro, and Van Gogh as having most strongly influenced the evolution of his impressionistic style, and he greatly reveres the American turn-of-the-century Impressionist Maynard Dixon as well. Says Singley: At its heart, Impressionism is a spirit. To best express this spirit, the work should be extremely abstract. The magic of an impressionistic canvas is the viewer's recognition of the greater image. By using the most fleeting bits of color and shape, I can demonstrate how each form is made of so many others.

Singley paints from the heart, with passion, and he chooses his colors instinctively, utterly without calculation. He will at times use a palette knife and even his fingers so he can apply paint to the canvas more directly, more intuitively, but he always uses a brush for the highlights and shadow strokes and other fine details. These methods have enabled him to imbue his paintings with a uniquely rich and vivid magnificence.