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About Us » Administration



Martha Monahan, Ed.D., Principal

Dr. Monahan joined the Center Street team in 2013. She has a strong background in child development and behavior as well as in special education. She received her Master of Arts degree from the Loyola Marymount University School of Education in Counseling and served for many years as a middle school counselor. She received her Doctorate in Educational Leadership from the University of Southern California. Her leadership experience includes facilitating professional development focused on the California Standards in English Language Arts as well as a school-wide transition to UCLA’s Cognitively Guided Instruction for math and readers/writers workshop. She is committed to integrating, developing, and improving a school-wide climate that fosters a safe and secure environment that includes, supports and values all learners.

As a parent and as an educator, Dr. Monahan believes that a strong partnership between school and home creates the optimal environment for student success and that, in addition to teaching academic standards, social-emotional learning is a primary function of elementary school. She is committed to the school's motto, Cougars CARE, and nurtures a school culture focused on Community, Authenticity, Resilience and Excellence. 

To contact Dr. Monahan, email: [email protected]

Portrait of Luke Olesiuk

Luke Olesiuk, M.Ed., Assistant Principal

Mr. Olesiuk joined the Center Street family in 2019. Prior to him assuming this role, Mr. Olesiuk worked as an elementary lab science teacher, Teacher-on-Special-Assignment (Assistant Administrator), and Summer Academy Principal in Redondo Beach Unified School District for four years, and as a middle school math teacher at El Segundo Middle School for eleven years. Mr. Olesiuk earned his Bachelor of Arts in Liberal Studies/Teacher Education from Dominican University of California in 2003 and his Master of Arts in Education/School Leadership from CSU Dominguez Hills in 2017. Mr. Olesiuk has a deep passion for mathematics instruction and spent several years working closely with Loyola Marymount University’s Center for Math & Science Teaching in order to support and implement a full vertical articulation of math in ESUSD. Mr. Olesiuk is also a firm believer in creating an equitable environment for all learners, as well as supporting teachers to create common experiences for students. 

As a career educator, Mr. Olesiuk is thrilled to be a part of the team in El Segundo and is looking forward to supporting students, families, teachers, and staff members at both Center Street and Richmond Street Elementary this year. Great things have been happening at Center Street, and he is excited to continue to work toward making them even better! Like Dr. Monahan, Mr. Olesiuk is committed to the school’s motto: CougarsCARE – a nurturing school culture focused on Community, Authenticity, Resilience and Excellence.


To contact Mr. Olesiuk, email: [email protected]