Which of the following is a type of professional staff found in public schools?

Guidance counselors are a critical component of the professional staff found in public schools. They play a vital role in supporting students' academic, social, and emotional development. Their responsibilities include helping students with course selection, providing career guidance, conducting assessments, and offering counseling for various issues such as mental health or personal matters. By fostering a supportive environment, guidance counselors can significantly influence students' overall well-being and academic success.

Other choices, while important for school operations, do not specifically categorize as professional staff focused on student development and support in the educational context. Sports coordinators generally focus on the athletic departments, administrative assistants assist with clerical tasks and school organization, and facilities managers oversee the physical aspects of the school, such as maintenance and safety. Although these roles are essential for the overall functioning of a school, they do not directly contribute to the personal and academic support that guidance counselors provide to students.