1760 E River Road Suite 115, Tucson AZ 85718

phone 520.721.4544  /  fax 520.829.7743





Thank you for choosing Speech Center of Southern Arizona for your speech and language services. We are a privately owned speech pathology practice, established in 1993 by Sherril Howard, M.S. CCC-SLP and Diane Hansen, M.A. CCC-SLP. Our licensed speech-language associates are highly qualified in the assessment and treatment of speech, voice, language, and swallowing problems. Our talented SLPs enjoy working with children of all ages, from infants to 18 years old. In recent years Diane has become the sole owner of Speech Center, a pediatric clinic where we focus on helping children and their families find answers, reach milestones and accomplish their communication goals. The children in our care are exposed to language and communication in a healthy, stress free way that considers the "whole child" and not only supports the child's growth, but the family's ability to communicate together. Using these evidence-based methods, Diane has gotten excellent results with her clients for three decades, and holds all in her office to her own standards, creating continuity of care for parents and their children.


For 20 years we have 



Today we are located in the cambric Center, centrally located along the Rillito River. The beautiful outdoor space around us provides a wonderful, calm environment for our patients. With pools of fish, turtles, grass and rocks around our office there is plenty of room for little ones to play. Our therapists enjoy taking walks through our offices, giving children the opprotunity to use fresh air and nature to facilitate talking. We strive to provide a low stress experience, with beauty and intrigue for our patients and their families.

Diane Hansen M.A. CCC-SLP and
Sherril Howard M.S. CCC-SLP
Founders of Speech Center - 1993




At Speech Center, all our therapists are ASHA certified and have their CCCs. To learn more about the importance of having a speech language therapist that is fully certified please clink HERE or visit our What is an SLP? page. 

Diane  Hansen,  MA, SLP-CCC

Diane received her Masters from Washington State University in Speech Language Pathology in 1984. She received her Bachelors from the University of Washington in Seattle. She completed her Clinical Fellowship Year in Alaska. Diane is a member of the American and Arizona Speech and Hearing Associations. Until 1988, Diane Practiced in Seattle and Alaska, working with children and adults in hospitals, schools, and child development clinics. She has also served as Communication and Speech Pathology adjunct faculty at the University of Alaska, Washington State University and University of Arizona. Prior to establishing the Speech Center of Southern Arizona, She worked with University of Arizona Medical Center providing inpatient and outpatient care for infants, children and adults. Diane is recognized for her exceptional skills in working with young children and with the family as a whole. In 1992, Diane and Sherril Howard (M.S. CCC-SLP) published "Facilitating Early Language" a guide for parents. Diane worked closely with Ear Nose and Throat physicians and voice therapist Sherril Howard, SLP, for 22 years, giving her expertise in treating pediatric voice disorders and Vocal Cord Dysfunction. Diane's most recent continuing education has been in the areas of Childhood Apraxia of Speech and Voice disorders. She was recently certified through Apraxia Kid's as a SLP qualified to treat Apraxia.

In 2008 Diane completed consultant training, qualifying her to implement customized wellness programs in health practitioners offices.

Christine Butalla,  MS, CCC-SLP

Christine has been at Speech Center since 2012. She graduated from the University of Arizona with her Masters of Science in Speech, Language, and Hearing Sciences in 2011. She completed her Clinical Fellowship year with Panacea Therapeutics, providing services for individuals across the lifespan. Christine has a breadth of experience in the Speech and Language discipline. In addition to practicing as one of our associates, she also works with adults providing speech, language and swallowing rehabilitation. While obtaining her degree in speech-language pathology, Christine completed her clinical research thesis in Childhood Apraxia of Speech, informing our team of the most current and up to date techniques involved in treating this challenging speech disorder. Prior to completing her degree she was a Speech-Language Pathology Assistant and worked with Special Education students within the public school system, where she gained valuable experience in the field and background in therapy procedures, treatments and interventions for school age children. Christine's willingness to go the distance for each patient, whether that means research on a case or extended work with parents is one of the many reasons we love having her at Speech Center of Southern Arizona.

 Laura Mosier, MS, CCC-SLP

We are so pleased to have Laura bringing 35 years of experience into our group at Speech Center. Graduating in 1981 from the University of Arizona with a Master of Science in Speech, Language and Hearing Sciences, Laura then worked ten years in Mammoth and Oracle school districts. After 25 years of service in Tucson Unified School District, she has become one of the most outstanding Speech-Language Pathologists. She received the 2016 TUSD Golden Apple Award in recognition of her extraordinary contribution at Borton Magnet School for her years enriching both students' and teachers' lives. Laura has expertise in Spanish and English evaluation and treatment of the full range of speech and language disorders with children of all ages. Laura brings years of working with diverse cultural populations. She is a passionate and fun people person who has a love for conversation and learning. We feel very privileged to have her with us. As part of her continuing education, Laura has been continuing to learn more about working with families from diverse backgrounds. She recently attended an Eddie Strand workshop, bringing her up to date on the most recent, science based research on treating children with Childhood Apraxia of Speech.

Jeannine Miller, MS, CCC-SLP

Jeannine is a bilingual Speech Language Pathologist with over 35 years of experience. She graduated from Arizona State University with her masters in Speech and Hearing Sciences. Jeannine has worked in hospitals including Tucson Medical Center, Carondelet and Holy Cross with inpatients and outpatients, schools and private clinics throughout southern Arizona. The experience she brings is a gift to our patients and staff at Speech Center and we feel honored to have her work with us. An effective SLP who can take on any case with professionalism and efficacy is what every family deserves when they look for a speech therapist, and we are happy to bring this value to our patients with the addition of Jeannine to our practice. She is a true expert in her field and a great resource in our community. 

Nicole Allen, MS, CCC-SLP

With years of experience in Tucson public schools, Nicole Allen is an excellent speech therapist who has an interest in expanding her experience. She graduated from NAU in 2011 with her Masters in speech and hearing sciences after gaining exposure in the field as a Speech-Language Pathologist Assistant. Her experience ranges from preschool children to high school teenagers and she has worked with a wide variety of diagnosis. With two small children of her own and so much time spent on the front lines of being a parent, we really appreciate Nicole’s hands on, fresh and current approach to working with families. Her enthusiasm for her work and eagerness to gain new skills is one of the reasons we are excited to have Nicole join us at Speech Center!

Whitney de Haseth,  MS, CCC-SLP

Whitney received her Master of Science degree in Communication Disorders and Sciences from Eastern Illinois University in 2008. In Illinois she served children for seven years with a wide range of developmental abilities in a variety of settings. She then spent four years in England working in a clinic setting. She has skills in the development, training and use of augmentative alternative communication devices (AAC) as well as creating therapy programs for children with language, cognitive and physical disabilities. Whitney is interested in building functional communication skills for children with complex communication disorders. In addition to working with development of early language skills and speech articulation disorders, she works with children with autism and other medical diagnoses, such as cerebral palsy, spina bifida, and Down Syndrome.  She brings a well-rounded approach to treatment informed by diverse clinical experiences. A mother of two small children, Whitney brings compassion and insight when counseling parents and children. We appreciate the intelligent and informed approach Whitney brings to Speech Center.

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