Addison Administrators

Susan Hallmark, Principal

Mrs. Hallmark's Blog

Susan Hallmark has lived in the West Cobb area for 27 years, and has been married to her husband Greg for 30 years. They have two daughters that attended Due West Elementary, Lost Mountain Middle and Harrison High School. Allison is 27 years old, a surgical Physician’s Assistant and married living in Smyrna, and Melissa is 24 years old and she is teaching 3rd grade at Mableton Elementary and is also living in Smyrna. Mrs. Hallmark received her undergraduate degree from Auburn, and her Masters in Educational Leadership from Kennesaw State University. She received her Specialist Degree from Lincoln Memorial in 2009. She has taught everything from Pre-K  to 2nd, 5th, 6th and 8th grades. Elementary was definitely her favorite! She also was an Area Lead Teacher for one year and learned much about Staff Development during that year. Most recently Mrs. Hallmark was the Assistant Principal at Still Elementary. She says, "I am thrilled to be a part of the Addison Elementary community and look forward to getting to know everyone. It is a great time to be an Addison Gator!"  Contact her at or (770) 578-2700.


 Brad Cohen, Assistant Principal

Mr. Cohen's Blog

Brad Cohen was raised in St. Louis, Missouri. He has lived in Atlanta since 1996. He has served as a teacher and assistant administrator in Cobb County. Mr. Cohen is a graduate of Bradley University and received his Master's and Specialist Degrees from Georgia State University. He is a huge Cardinals fan, but you'll also see him rooting for the Braves! He and his wife, Nancy, have two children and 2 cats, Alex and Oscar. When he is not at school, you'll find him playing softball, watching or attending any sporting event, eating Chocolate Chip Cookies or traveling.  Contact him at or by phone (770) 578-2700.