Trained intensively with Jeffrey Yuen, Evan received comprehensive instruction in classical herbal medicine, channel systems (sinew, luo, divergent, eight extraordinary vessels), and specialty disciplines including gynecology, pediatrics, oncology, gastroenterology, and external medicine.

Early exposure to the classical formula tradition—combined with deep and extensive study with Jeffrey Yuen—profoundly shaped his clinical reasoning. From this training, he developed a clear and methodical way of thinking: formulas are not merely prescriptions, but expressions of physiology and intention. They convey the spirit and strategy of treatment. Formulas are teachers.

As director of Herbal Medicine at Maryland University of Integrative Health, a university focused mainly on acupuncture, Evan gained expertise in training students and experienced acupuncturists in herbal medicine. His career has, in part, been devoted to building a clear, workable bridge—helping acupuncturists step more fully into herbal medicine without abandoning the clinical strengths that define their practice. Evan's herbal course broadens the scope of what acupuncturists can treat, making their diagnostic thinking more structured, nuanced, and deliberate. That expanded capacity does not remain confined to herbal prescriptions; it returns to the treatment room, sharpening their use of acupuncture and strengthening their overall clinical judgment.

A defining feature of his teaching is the integration of herbs with acupuncture channel systems: Luo vessels, Sinew Channels, Divergent Channels, Eight Extraordinary Vessels, and classical physiology. This approach provides a natural pathway for acupuncturists to expand into formula construction and herbal therapeutics.

Evan’s education has been deliberately eclectic, allowing him to view clinical reality through multiple lenses. He teaches students how to understand formula matching in the classical tradition, how to modify established prescriptions, and how to construct formulas from scratch for a unique patient at a unique moment. Pulse and tongue diagnosis remain central in this process. Flexibility, discernment, and clinical responsiveness define his method.

Over two decades of teaching-currently at Georgetown University School of Medicine, Washington DC, Daoist Traditions College of Medical Arts, NC and privately throughout the US, and internationally- Evan designed and directed multi-year herbal training programs that bridged Five-Element frameworks, Neijing channel theory, classical formula traditions, and specialty practice. In the current Yao Shan Herb Program he refined this structure around the physiology of substances—Qi, Blood, Fluids, Jing, and Shen—creating a comprehensive system that trains practitioners to think broadly yet precisely.

Evan's teaching is known for his clear, structured, and deeply classical approach. His goal is to cultivate herbalists who can move fluidly between traditions, apply herbs to channel systems with confidence, and construct formulas with technical precision and clinical insight.