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 

Robert Grgetic (B.S., University of West Georgia) joined the faculty in 2018 and teaches Biology, Honors Biology, A.P. Biology, and Oceanography. Prior to teaching at Mercy, he spent four years teaching Physics at McIntosh High School in Peachtree City, GA. He is a parishioner and a member of the church choir at St. Mary Magdalene in Newnan, GA. He is really looking forward to this year! 

Steve Oldenburg (B.S., Saint Joseph's University) joined the faculty in 2019 and teaches Chemistry, Honors Chemistry, and A.P. Chemistry. In the winter, he will be doing stats and scoring for the Boys' Basketball team. While at Saint Joseph's, he did research in organometallic chemistry, studying carbon dioxide activation. He is a big sports fan, especially rooting for Saint Joseph's Basketball, Notre Dame Football, and the Cleveland Browns. Being new to the area, he is looking forward to exploring all that the Atlanta area has to offer. He attends mass at Immaculate Heart of Mary Parish in Atlanta.

Ryan Schilling (B.S., Georgia Tech) joined the Mercy faculty in 2013 and teaches Physics, AP Physics, and Meteorology. He coaches Track and Cross Country and is the Science Olympiad advisor. After graduating from OLM in 2005, Ryan went 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, and spending quality time with his three kids and his wife Brittany, a Mercy 2005 grad.

Katie Schneider (B.S. Mechanical Engineering: Product Design, Stanford University) joined the faculty in 2018. She teaches Geometry, Anatomy/Physiology, and Conceptual Physics and coaches the girl's soccer team. She loves outdoor education, hiking, backpacking, and anything outside, especially sports. She also loves dancing, running, painting, and reading.