Practitioners You Can Trust

Westside Behavior Therapy was established in 2015 initially providing home-based services to just a few clients. After recognizing the increasing need for services in our community, we opened the doors to our center-based clinic in 2016. We continue to be committed to the highest standards of care.


Kelsey Townsend, M. Ed., BCBA, LBA

Executive Director
Kelsey earned a Master of Education specializing in Applied Behavior Analysis from Arizona State University in 2013 following undergraduate work at the University of Oregon. She has been practicing ABA since 2012. She is a Board Certified Behavior Analyst® (BCBA®) and a Licensed Behavior Analyst (LBA) in the State of Oregon. She is a participating member of Oregon Association for Behavior Analysis (ORABA) where she serves on the Public Policy and Leadership Committees. She is also a participating member of the Association for Behavior Analysis International (ABAI) and the Association of Professional Behavior Analysts (APBA). Kelsey has acquired a wide range of experiences with evidenced-based interventions in a variety of settings including center, home, community, and school-based environments. Her primary area of expertise is providing early intervention, ABA-based services to children on the Autism Spectrum.​ Although the ABA needs of the community are great, she feels it is important to keep her practice private and locally owned in order to provide an extremely child-centered, individualized ABA experience. When she's not at work, she spends her time with family including her husband and three children.

Serena Rivard, M.Ed., BCBA, LBA

Clinical Supervisor
Originally from California, Serena graduated from Menlo College in California with a BA in Communications. After having worked in various child-centered environments including preschools, elementary schools, and private in-home care, Serena happened upon Westside in the Spring of 2016 and felt she had finally found her calling as a behavior therapist. She went back to graduate school to further her career and support her passion for ABA. After graduating from Arizona State University with a Master of Education in Curriculum and Instruction of Applied Behavior Analysis, Serena became a Board-Certified Behavior Analyst® in the winter of 2018. She feels truly fortunate to be a piece of every child’s puzzle that comes through the Westside doors. In her free time Serena enjoys exploring the beautiful Pacific Northwest with her Beagle in the passenger seat.

Melissa Pollard, M.Ed., RBAI

Assistant Supervisor
Growing up in Iowa, Melissa attended Dakota Wesleyan University in Mitchell, S.D. where she received a Bachelor of Arts in Human Services. During college she worked with at-risk adolescent girls, at a residential treatment facility. While working directly with residents on self-management and daily living skills, she discovered a love for helping people and working closely with them to discover their full potential. After graduating and moving to Oregon, she took some time off to start a family. Melissa joined the Westside team in the Fall of 2016. At that time, she chose to focus her career on ABA and further develop her skills by attending Arizona State University’s ABA Graduate Program. She graduated in the Spring of 2018 with a Master of Education in Curriculum and Instruction of Applied Behavior Analysis. With only a few more months of practical hours left to accumulate, Melissa plans to sit for the BACB® board examination in February 2020. When she isn’t working, Melissa can usually be found in the stands at a ball game or spending time with her husband and her three children.

Julia Linton, B.S., RBAI

Lead Therapist
Julia started working at Westside in March 2021. Julia moved from Indiana in March 2021, but originally grew up in Chicago, Illinois. She received her undergraduate degree from Ball State University with a Bachelor of Arts in Psychology with a focus on art and ABA. Westside Behavior Therapy is Julia's third ABA clinic and she is thrilled to bring her 3 years of experience to all her new learners. She hopes to put her ABA training to good use and return to graduate school to earn her BCBA certification in the future. In her spare time you can catch Julia hanging out with her husband and dog, cooking, and exploring her new home state of Oregon.

Will Calder, B.A., RBAI

Lead Therapist
Will started working at Westside in April 2021. He is a Portland native and graduated from University of Oregon with a bachelors’ degree in Sociology. He is currently in graduate school pursuing a degree in education and hopes to eventually become a BCBA. He is interested in finding ways to improve the lives around him whether that’s working in ABA or offering friends advice, he loves being a shoulder to lean on. He has worked with kids his entire life and likes to think that they keep him young. In his spare time, he enjoys spending time outdoors, skateboarding, and listening to music.

Hannah Waardenburg, B.S., RBAI

Line Therapist
Hannah completed her undergraduate studies at Oregon State University where she received a Bachelor of Science in Psychology. While pursuing her degree, she worked as an RBAI providing ABA therapy to children in pre-school and home settings. After receiving her degree, she worked as a mental health technician at the only standalone children's subacute crisis psychiatric facility in Oregon. She has always been passionate about helping children and looks forward to her future in the field of ABA and being a part of the Westside team. In her spare time, you will likely find her spending time with her significant other and their golden retriever.

Ann Eby, RBAI

Line Therapist
Ann started working at Westside in April of 2022. She was born and raised in Oregon and spent time after high school volunteering in her local community. She then spent a year in FEMA Corps which involved her traveling to Mississippi, Texas, Georgia, and Louisiana to help the communities before and after natural disasters. This experience confirmed Ann's passion for wanting to help others so she later became certified as a Registered Behavior Technician (RBT). Ann worked as an RBT for a year before beginning her career at Westside. During her free time, Ann enjoys spending time with her significant other, going on hikes, and playing with her two cats.

Rachel Sandin, B.S., RBT, RBAI

Line Therapist
Rachel started working at Westside in August 2022. She has been working with children in one way or another for the last 10 years, starting as a swim instructor for preschool-age kids. She has also worked as an aide in middle school classrooms before transitioning to providing ABA services full time. Working in ABA has affirmed her passion for working with children as a way to provide support for the growth and development of the clients she serves. In the future, she hopes to return to graduate school to obtain her BCBA certification. In her free time, Rachel is an avid reader and enjoys outdoor adventures with friends.

Mira Winters, B.A., RBAI

Line Therapist
Bio coming soon!

Jodi Shiraishi, B.Ed., RBAI

Line Therapist
Bio coming soon!

Jeffrey Espedal, M.Ed., RBAI

Line Therapist
Bio coming soon!

Yvonne Koenig

Operations Manager

Will Townsend, MBA

Strategic Business Manager