Robert Stewart

Head Master and Head Teacher - Biology

Telephone: (925) 292-4465

Email: rstewart@sfbpa.org

Robert earned his Bachelor’s degree in Biology from Salford University and has been awarded postgraduate degrees from The University of West London, Hull University, and Reading University, United Kingdom.

As a Chartered Biologist and Member of the Society for Biology, London he has extensive experience teaching the Biological Sciences, including working as a Senior Lecturer in Biological Sciences at College level and teaching IB Biology in High schools the United Kingdom, United States and Middle East.

Robert has held management and administrative positions in Colleges and Schools including the roles of Head of School at a college on Oxfordshire, UK, Director of Admissions and Marketing a Community College in Colorado, and College Counselor and Director of Careers and Higher Education at a British School in Egypt.  Before joining the San Francisco Bay Preparatory Academy he held a senior management position as Director of Academic Affairs and Principal at an Independent IB World School in the San Francisco Bay area.

Robert has also worked for a Non Profit Life Sciences Organization, Washington DC with the role of promoting Inquiry Based Learning and the use of technology in Science Teaching. Robert delivered teacher workshops that focused upon Biology and Microbiology and the use of student centered, collaborative project work, and inquiry led laboratory investigations.


Geoffrey C. Lewis
Teacher - English Language Development and Theater Arts
Telephone: (925) 456-9000
Geoff Lewis completed his undergraduate work with a focus in languages at Excelsior College, where he graduated magna cum laude. He earned his Master of Arts in Organizational Leadership at Brandman University in Walnut Creek, California. Additionally, he holds English teaching certificates from the University of Cambridge and from i-to-i International. While serving as a Chinese Linguist in the U.S. Air Force, Geoff earned associate’s degrees in communications technology and Mandarin Chinese from the Community College of the Air Force and the Defense Language Institute, respectively.
Geoff has taught English in China, Japan, and various U.S. locations both professionally and as a volunteer. He taught Mandarin Chinese at the Defense Language Institute in Monterey, California, where he also served as acting Chief Language Instructor overseeing students taking intermediate and advanced courses in seven different languages. Additionally, Geoff has been onstage and behind the scenes as a member of various community-based and school performance groups.
Prior to joining SFBPA, Geoff worked in student services at Brandman University, then as an English teacher and theatrical stage crew manager at an independent school in the San Francisco Bay area. He is a member of CATESOL and Asia TEFL.

Brett Banducci

Social Studies Teacher - History & Economics



Mr. Banducci did his undergraduate work in history at the University of San Diego and holds a Master of Arts in Teaching with an emphasis on history from the University of San Diego. He comes to SFBPA from Tarbut V'Torah Day School in Irvine, California. Mr. Banducci taught previously in Panama as well as Japan. Outside the classroom Mr. Banducci enjoys hiking and world travel. Professionally, he is a member of the TESOL International Association.


Kate Johansen

Academy Counselor and Resident Counselor/Dean of Boarding



Kate Johansen did her undergraduate work at The University of Puget Sound and holds a Master of Arts degree in Psychology and Religion from the Andover Newton Theological School. Most recently she worked as the Dean of Students for a private boarding school in New England. She has an eclectic educational and vocational background and has been working with adolescents for over a decade in classrooms and camps. Kate was drawn to SFBPA because it allows her to combine her unique blend of skills and education in new and exciting ways.