The Science Department at Our Lady of Mercy Catholic High School offers students a college preparatory experience in the physical and biological sciences. We offer rigorous laboratory courses in Biology, Honors Biology, Anatomy, Chemistry, Honors Chemistry, Physics, Conceptual Physics, and Environmental Science. AP courses in Chemistry and Physics are offered to students who have excelled in foundation classes and who have teacher recommendations.

Meet the Faculty 

Chelsea Arriola (B.S., Auburn University) joined the faculty in 2016, and will be teaching Biology and AP Biology. She also will serve as the Head Coach of Girls Soccer. While attending Auburn University, she was an active member of Silver Wings and Operation Smile. She is a passionate fan of the Atlanta Braves, Auburn Tigers, Dallas Cowboys, Dallas Mavericks, and Chelsea FC. She is a member of Holy Trinity Catholic Church. In her spare time, she enjoys hanging out with her family and friends, reading (preferably nonfiction), and going to sporting events.

Sergio Burguet (B.A., University of Miami, M.A., Georgia State University) joined faculty in 2008, and will be teaching Chemistry, Honors Chemistry, and AP Chemistry. He will also serve as the National Honor Society sponsor and the Science Olympiad Coach. He was a high school science teacher at Riverdale High School in Clayton County, GA for 28 years. He is a Falcon, Braves, and University of Miami fan and enjoys diving, reading, and traveling with his wife. He has been a member of the St. Philip Benizi Parish for more than 30 years.

Ryan Schilling (B.S., Georgia Tech) joined the Mercy faculty in 2013 and teaches Physics, AP Physics, Environmental Science, and Honors Algebra II. Coaching Track and Cross Country and co-leading the Science Olympiad with Sergio Burguet. After graduating from OLM in 2005 Ryan went on to Georgia Tech where he studied Atmospheric Sciences. While there he interned at the National Weather Service and went to Greenland for atmospheric Chemistry Field Research. He is a huge Atlanta Falcons Fan, and a parishioner at St. Gabriel’s in Fayetteville. In his spare time he enjoys camping, outdoor activities and concerts.

Fletcher Williams (B.S., Physics, Clemson University) joined the faculty in 2016 and will be teaching Conceptual Physics, Anatomy and Physiology, and SAT Preparation. He is obtaining his Master's in Education through the ACE program at Notre Dame. Among other interests, Fletcher is an avid reader. Through the study of the Scriptures, early Church Fathers, and modern authors like C.S. Lewis and G.K. Chesterton, he was led to the Catholic Church and converted in 2014. Since then, he has worked to deepen his knowledge of both theology and science and enjoys sharing that with family, friends, and students.