Sifu Mark Cheng now teaches the Yang style Tai-Chi form in West Los Angeles, Santa Monica, & the Pacific Palisades. He studies Combat Shuai-Chiao with the Lin family and Sil Lum Fut Ga with the Lee family. The bulk of his teaching is on a private / semi-private basis, through seminars with other martial arts schools, or with select groups of law enforcement or military groups for Combat Shuai-Chiao. In September 2005, he was annointed as the Sifu of the Los Angeles branch of Gee Yung Sil Lum Fut Ga. He also co-authored a new Hwa Rang Do textbook with Chiefmaster Taejoon Lee, released by Black Belt in Fall 2005. The first printing of the book sold out in one month.

In addition to his writing duties for martial arts publications around the world, he is also a Chinese medicine researcher and licensed acupuncturist, specializing in Tui-Na therapies. With Dr. Jae-Man Kim (founder of the World Tui-Na Association and Shippalgi martial arts instructor from Korea), Sifu Cheng put together the www.tui-na.com site to open peoples' minds and eyes to the power of Tui-Na medicine. He served as disciple candidate to Dr. Jae-Man Kim, working to inherit Dr. Yu Da-fang's formidable Tui-Na lineage, directly under Dr. Kim's tutelage.

In late 2003, Sifu Cheng opened his own practice in Beverly Hills, working in conjunction with renowned Professor Xiuling Ma at the Acu-Herbal Medical Arts Clinic as Tui-Na orthopedics & sports medicine specialist. With the explosive growth of his practice, Sifu Cheng was forced to look for clinic space again, finally relocating to the current location across from the Santa Monica Airport in the spring of 2004. In his private practice, Sifu Cheng has continued to flourish. In the summer of 2004, he accepted a faculty position to teach Tui-Na at Emperor's College, and in the fall of 2004, Yosan University followed suit. Sifu Cheng holds a doctorate degree in Acupuncture and Oriental Medicine, with a highly commended dissertation on the treatment of migraine headaches through Oriental structural medicine.