Returning to the United States with a large number of sketches from Europe and North Africa, Reiffel began to exhibit his work at various shows. His unique style, comprised of a linear, string-like application of strokes of color, made him appear "modern" and progressive among his fellow painters. Unfortunately, his association with modernism made it difficult to sell his paintings.
In 1912, Reiffel moved to Silvermine, Connecticut, a small village popular with artists. He helped found and served as the first president of the Silvermine Guild of Artists. By 1921, he had finally cut all ties with commercial art and became a full-time painter.
Reiffel moved to Southern California in 1927, locating his home and studio in San Diego. He was a member of the San Diego Art Guild, the Contemporary Artists of San Diego, the California Art Club and the Laguna Beach Art Association. His many awards include the Harrison Prize, Los Angeles Museum, 1926, the Art Guild Prize, San Diego Museum, 1926, and the Gold Medal, California Art Club, 1928.