Skip Navigation



Peri-Anne Chobot, Ed.D.
Interim Head of School

What one word describes Winston? Transformative.

What do you love most about Winston? The school community; the parents, students, teachers, board members, and staff.

Education: Dr. Chobot holds an Educational Doctorate degree in Administration Leadership for Teaching and Learning from Walden University in Minnesota, a 6th year degree in Educational Administration and a Master’s degree in Bilingual/Bicultural Education, both from the University of Connecticut and has an undergraduate degree in Education/Spanish from Eastern Connecticut State University.

Dr. Chobot is Winston's Interim Head of School for the 2021-2022 school year. Before accepting the position, she was the President and Head of School at Emerson Preparatory School in Washington, D.C.

Julie Hanson, M.Ed.
Head of Lower School

What one word describes Winston? Inclusive.

What do you love most about Winston? The expertise of our teachers and their love for our students.

Education: Ms. Hanson received her Bachelor of Arts Degree from the University of Texas at San Antonio and a Master of Education in Special Education with a focus in Assessments from Texas A&M University San Antonio. In conjunction with her master's degree, Ms. Hanson is trained in Dyslexia Therapy and is a Certified Academic Language Therapist.

Ms. Hanson has been at Winston since 2008 and has ten years of teaching experience in other settings. She has taught Lower School Math, Reading, Language Arts, Science, Social Studies, and Computer, as well as Middle School Reading, Language Arts, and American History, and Upper School English. Mrs. Hanson is also a part-time professor in Trinity University’s Education Department. Prior to coming to Winston, she taught in both the Northside and Boerne Independent School Districts. Ms.Hanson has also worked in Guatemala with Food for the Hungry as the Director of Communications in their Child Sponsorship Program.

Steven Yocham, M.Ed.
Head of Middle & Upper School

What one word describes Winston? Nurturing.

What do you love most about Winston? Winston helps develop students' strengths and builds confidence.

Education: Bachelor of Science in Biology from The University of Texas at San Antonio; Master’s Degree in Education with a concentration in Technology & Curriculum from Houston Baptist University.

Mr. Yocham joined Winston in 2000, first teaching Upper School Science, then Digital Media courses. He assumed the role of Head of Upper School in 2009, and the additional role of Head of Middle School in 2017. Each year, Mr. Yocham works closely with our College & Career Counselor to ensure that each student is making progress down the path that best fits his or her needs.

Robyn Borth, M.Ed.

Director of Admissions

What one word describes Winston? Caring.

Education: Mrs. Borth received an Associate’s Degree in Special Education from the University of Great Falls; a Bachelor of Science Degree in Elementary Education from the University of Montana Western; and a Master of Education in Reading Curriculum and Instruction from Grand Canyon University.

Experience: Before her role as Director of Admissions, Mrs. Borth taught Middle School Language Arts and Reading, as well as U.S. History and College & Career Prep in our Upper School. Prior to coming to Winston, she taught in both the public and private school sector, primarily in the area of special education.

Isabel Jones,  B.A. 
Chief Advancement Officer

What one word describes Winston? Compassionate

What do you love most about Winston? Winston helps students gain confidence to achieve what they once thought was unachievable.

Education: Bachelor of Arts degree from Our Lady of the Lake University

Ms. Jones joined Winston in 2021 as our Chief Advancement Officer and manages all aspects of fundraising and advancing the mission of the school, including special events such as the Auction & Gala, Symposium and Annual Fund. She has twenty years of experience working for various nonprofit organizations as a fundraising professional.

Marissa Ybarbo, B.B.A.
Director of Finance and Operations 

What one word describes Winston? Dedication.

What do you love most about Winston?  Exactly what we do.  WSSA gives children with learning difficulties a safe place to learn and just be themselves.

Education: Bachelor of Business Administration, Major in Accounting

Experience: Marissa Ybarbo began her career in Advertising as Account Payable Administrator and after establishing an excellent record of performance was continuously promoted to position of Controller.  She has 23 years of experience in the Accounting field and has excellent organizational, time management, and research skills with the ability to effectively handle complex financial data and prepare comprehensive reports.  She is skilled in all areas of Accounting that include Financial and Cash Flow Statement Preparation and Reporting, General Ledger, Accounts Payable, Accounts Receivable, Payroll, Budgeting and Forecasting, and Tax Reporting.  She joined Winston School San Antonio in February 2021 and is a graduate of University of Texas at San Antonio.