Speech & Language Services of Marin-Sonoma's professional staff members are all licensed by State of California and certified by the American Speech-Language and Hearing Association (www.asha.org).
The professional experience of our staff ensures complete and expert diagnosis along with appropriate treatment of clients ranging from infants to seniors.

Petaluma Therapists



Lori WalkerLori Walker

M.A., C.C.C.- S.L.P
Lori Walker received her Baccalaureate and Master of Arts degree from California State University, Fresno. Lori holds a credential as a speech and language specialist, and is licensed by the state of California. She is also certified by the American Speech Language Hearing Association as a speech language pathologist. Her expertise includes diagnosis and treatment of children and adults with a variety of disorders including but not limited to, developmental disorders, auditory/language processing problems, early intervention, dysphasia, and neurological disorders. She has experience in clinic, schools, home health, and acute hospitals.


Nancy SchwartzNancy Swartz

M.A., C.C.C., SLP
Nancy Schwartz received her Masters degree from the University of Denver.  She is certified by the American Speech-Language- Hearing Association and licensed by the State of California.  Her expertise includes working with both children and adults with neurologically based problems, craniofacial disorders, developmental disorders, developmental speech and language delays, central auditory processing problems, voice disorders, adult cochlear implant rehabilitation and reading disabilities.  She is certified by Read America, Inc. to provide instruction in PhonoGraphix®, a reading program developed in England.


Kasena KafkaKasena Kafka

M.A., C.C.C.-SLP
Kasena Kafka graduated from Kent State University in 2010 with a Bachelor of Arts in English.  She continued her education at the University of Akron, graduating in 2012 with a Master’s of Arts in Speech-Language Pathology.  Kasena is licensed by the state of California and is certified by the American Speech Language Hearing Association (ASHA).  Additionally, she holds a credential with the Commission of Teacher Credentialing Speech-Language Pathology Services.  Kasena has a broad range of knowledge including but not limited to preschool and elementary populations with extensive work in Augmentative & Alternative Communication (AAC) with children diagnosed with Autism Spectrum Disorder.  She has clinical experience with middle, high school, and adult populations.


Katie BaumbachKatie Baumbach

Katie Baumbach graduated from Sacramento State University in 2009 with a Bachelor of Science in Speech Pathology and Audiology. She continued her education at Sacramento State University, graduating in 2011 with a Master’s of Science in Speech-Language Pathology. Katie is licensed by the state of California and is certified by the American Speech Language Hearing Association (ASHA). She is certified in Hanen It Takes Two to Talk and PROMPT Level 2 trained. Katie has received the Award for Continuing Education (ACE) in 2014 and 2016. Katie has a broad range of knowledge including assessment and play based treatment for children 18 months to 18 years diagnosed with Autism Spectrum Disorder, receptive/expressive/pragmatic language delays, articulation/phonological disorders, fluency, AAC, and apraxia of speech. She also was a Social Thinking group leader for 4-7-year olds. In addition, Katie has experience with the adult population, in assessing and providing treatment for dysphagia, speech/language disorders, cognitive-linguistic impairments, AAC, dysarthria, apraxia of speech, and other communication deficits.

return to top