Dr. Harker is also currently the District physician for the Cumberland Valley School District (CVSD). Dr. Harker’s past medical affiliations includes staff physician for Health America, Inc., Beacon Medical Group/ ProMedCo, and Pinnacle Health System, where he also served as a supervisory physician for mid-level provider(s). Dr. Harker has served as a preceptor for first and second year medical students from the Pennsylvania State University Milton S. Hershey College of Medicine.