- American Osteopathic Association
- American College of Osteopathic Family Physicians
- American Academy of Family Physicians
- American Academy of Family Physicians PA Division
- National Board of Osteopathic Medical Examiner
Dr. Westerberg joined PCOM in 2017. Prior to joining the faculty, Dr. Westerberg was the Director of Osteopathic Medical Education for the Christiana Care Health System.