By profession, Dr. Eisen was a University Professor specializing in constructing mathematical models used for studying medical problems such as those in cancer chemotherapy and epilepsy.  He has authored 11 books and numerous papers in advanced mathematics.

Dr. Eisen has studied Yoga, Judo, Shotokan Karate, Aikido and Tai Chi. He taught Judo in a community center in Toronto. Dr. Eisen was the founder and chief-instructor of the Shotokan Karate Clubs at Carnegie-Mellon and Dusquene Universities and the University of Pittsburgh.

He has taught Tai Chi at community centers in New Jersey, the Chinese Community School of South Jersey, Temple University, a Master’s Dance Class at Glassboro State College and Triton High Schoowasl and also Qigong at some of these locations.  He taught a Qigong course at Lehigh University.  He helped teach Yoga at Graterford prison.

One of Master Mark’s students introduced him to Master Mark and Praying Mantis.  He taught Praying Mantis at Master Mark’s School in Philadelphia and at Temple University. He became a Disciple of Master Mark and taught Praying Mantis, Qigong and Tai Chi at branches of Master Mark’s schools in South Jersey.