Sierra Linda Mascot
Sierra Linda High School
Tolleson Union High School District

Meet Our Staff

We are proud of the exceptional faculty and staff here at Sierra Linda High School. They are a dedicated group of men and women who truly care about helping students succeed. Please meet the faculty and staff who work every day to help students excel.

A Parent's Right to Know

As a parent of a student at Sierra Linda High School, you have the right to know the professional qualifications of your child's teachers. Please read A Parent's Right to Know.


Tim Madrid
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Jim Kramer
Assistant Principal; Athletics
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Stephen Ybarra
Assistant Principal; Registration
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Lorin Sempkowski
Assistant Principal; Instruction
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Christina Valenzuela
Assistant Principal; Discipline
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Jennifer Vidrio
Admin Assistant; Principal
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Staff by Department

To find a staff member by department, please click on the appropriate button.