As a husband and wife team, Randy and Heidi Stewart launched Blue Horizon Therapy in the summer of 2011 with the mission to provide exceptional child centered care to families in the Southwest Denver area. Combining Randy’s sales management experience and Heidi’s clinical experience as an Occupational Therapist, the husband and wife team have steadily grown Blue Horizon Therapy together. Our daily goal is to establish and maintain relationships with our clients, their families, and payers of services while providing exceptional care that is client driven and focused on independence.
CEO and Owner
Randy Stewart and his wife, Heidi founded Blue Horizon Therapy, LLC in 2011. Randy was born and raised in the Pacific Northwest where he was an avid steelhead fisherman and raced motorcross. He received an Associates Degree in 1989 from Universal Technical Institute in Automotive and Diesel Technology and has worked predominantly in the industrial and manufacturing fields in sales and management. After 22 years in those industries, Randy decided to go into the outpatient healthcare business with his wife. Randy enjoys golfing, fishing, and bow hunting. He lives with his family and several pets in the Roxborough area of Littleton, Colorado.
Heidi Stewart, M.Ed., OTR/L
Clinical Director and Owner
Heidi Stewart and her husband, Randy founded Blue Horizon Therapy, LLC in 2011. A native of Colorado, Heidi left her home state to attend Pacific University in Forest Grove, Oregon where she graduated in 1994 with a Bachelors of Science in Occupational Therapy. Heidi worked for 5 years as a pediatric Occupational Therapist in a local school district in the Portland metropolitan area while also occasionally working weekends in acute care psychiatry at St. Vincent’s Hospital. In 2000, Heidi moved back to her home state with her husband. Since her move back to Colorado, Heidi has worked at Children’s Hospital, Elizabeth School District, and Douglas County School District. In 2011, Heidi completed her Masters of Education with an emphasis on Autism Education from Regis University. Heidi enjoys reading, hiking, and most of all spending time with her husband, Randy and their two children.
Monica Ritzdorf, COTA/L
C.O.T.A (Certified Occupational Therapy Assistant)
Monica graduated from St. Mary’s College in Minneapolis, Minnesota in 1985 with an Associate Degree of Applied Science in Occupational Therapy. She previously studied at St. Cloud State University in Minnesota in Special Education. Monica has 30 years of Occupational Therapy experience. She has been working in the pediatric field since 2001. Previously she worked in the field of adult physical rehabilitation in many areas such as hospitals, home health care and skilled nursing facilities. She was also a faculty member at Arapahoe Community College in the Certified Occupational Therapy Assistant program from 1995-2002. She lives in Highlands Ranch and has two teenage boys, 14 and 17. She enjoys hiking, reading and gardening, as well as watching her kids play many sports.
Sarah E. Yost, OTD, OTR/L
Sarah is a Registered and Licensed Occupational Therapist in Colorado. She earned her Doctor of Occupational Therapy from Washington University School of Medicine in St. Louis, MO in 2013. Sarah’s clinical work experience includes outpatient pediatrics and early intervention in the community. Sarah is passionate about children and has worked with children of all ages and abilities. She enjoys hiking and biking with her husband and puppy, and just being in the Colorado sun!
Mallory Bigler, B.A.
Speech Language Pathologist Assistant
Dianne Fulwider M.A., CCC-SLP
Speech Language Therapist
Dianne is virtually a native of Colorado, having lived here since she was 5. Growing up in Fort Collins, she attended the University of Colorado at Boulder for her undergraduate degree and then attended the University of Northern Colorado for her Master’s in Speech-Language Therapy.
Dianne has been practicing in public schools since 1992. She has been working in Douglas County School District at Trailblazer Elementary school for the past 10 years. Dianne has a wide variety of experiences with students ranging from autism to augmentative communication to emotional/behavioral needs.
She especially enjoys collaboration with parents to foster growth. Blending public school knowledge with clinical work has been fun and enjoyable.
Dianne and her husband, Kurt, are parents to two young adults. Their daughter Hailey is a senior at The University of Notre Dame and son Keegan is a sophomore at Gonzaga University.
Dianne has been embracing the “Empty Nest Life” and she and her husband love to travel, eat great food and relax.
Emily Penrod, MS, CCC-SLP
Emily graduated from Marquette University in Milwaukee, WI in 2013 with a Masters of Science degree in Speech-Language Pathology. She has worked with children aged 0-21 in pediatric clinic and public school environments and is passionate about improving communication skills in children of all abilities. Emily loves working with children and their families and believes learning should be fun. She lives in Littleton, CO, with her husband and 2 young children and enjoys reading, hiking, and snowboarding.