Rosier Tamara Phd: - Tamara Rosier, PhD, has been a college administrator, a professor, a leadership consultant, a high school teacher, a business owner, and an ADHD coach. Through those adventures, she has developed valuable insight into ADHD and how it affects one's life. As founder of the ADHD Center of West Michigan, Dr. Rosier leads a team of coaches, therapists, and speech pathologists to help individuals, parents, and families develop an understanding of ADHD and learn skills to live with it effectively. She is the author of Your Brain's Not Broken and You, Me, and Our ADHD Family.