Our Team


Cornerstones of Maine is the result of a labour of love for our two founders, Josh and Jake. It is independently owned by them and was established on the foundation of their desire to create a young adult transition program that is based on mental health research and experience. Not only are they the founders, they are also part of our core clinical staff.

Clinical Team

Josh Altschule, Psy.D.

Founder and Clinical Director

Josh is a licensed psychologist who has had extensive experience in the assessment and treatment of adolescents and young adults in various settings including residential treatment programs, boarding schools, and private practice. Josh was the co-creator of the Cornerstones' model and is personally involved in the administration and clinical direction of the program. When he is not providing support and guidance to our staff, Josh enjoys surfing, traveling, listening to roots-rock reggae, and spending time with his wife and daughter and their two rambunctious puppies. 

Eric Beaudoin, Psy.D.

Clinical Coordinator

Eric is a psychologist who specializes in the treatment of the young adult population. He has been part of the Cornerstones team since its opening and has become an integral component of the program and its culture. When not working with our young adults at Cornerstones, Eric is providing them with lectures on psychology at the University of New England as an adjunct professor. Eric also has a passion for music and can often be found leading jam sessions on his guitar at our program houses. In his spare time, Eric plays guitar, writes, enjoys technology, and explores new foodie spots with his wife.

David Kinsella, MSW, LCSW

Psychotherapist & Training Coordinator


David is a licensed clinical social worker who has extensive experience in the mental health field as a therapist, supervisor, teacher, and program administrator. He has served as the Division Manager of the Behavioral Health Sciences Institute, Director of Training and Counseling and Children’s at Granite Bay Care, and is currently Adjunct Faculty in the Mental Health and Human Services Department at the University of Maine at Augusta. David has a strong passion for work with clients to aid them to overcome their challenges and build fulfilling lives through the transformative therapeutic process.

David has undergone advanced training in anxiety at Harvard University and has studied multiple therapeutic interventions. He specializes in utilizing a Strengths-Based approach coupled with foundational models such as CBT, DBT, Object Relations, Motivational Interviewing, and Solution-Focused therapy. His talents in art, composing and playing music, and writing poetry allow for him to integrate creativity into the therapeutic dynamic. David excites clients to soar above their challenges and achieve a successful rewarding life.   

Yezmin Name, M.S. Counseling, LPC



Yezmin is an associate Professional Counselor trained in Systemic, Person Centered, and Gestalt psychotherapy. Born and raised in Mexico, she moved to the U.S. to complete her bachelors at the University of Texas in San Antonio. She then returned to Mexico City to continue training at two separate training institutes: the Instituto Personas and the Instituto Humanista de Psicoterapia Gestalt.  Finally returning to the United States, she completed her Masters in Counseling at her alma mater, the University of Texas in San Antonio. To date she has worked in a variety of settings in both Mexico and the United States, working with individuals, couples, and families. 


Yezmin loves to travel, hike and immerse herself in artistic endeavors. 

Michael Tartaglia, Psy.D.

Licensed Clinical Psychologist

Michael is a licensed psychologist who received his doctorate in psychology from Antioch University in 2013 and went on to work in a diverse array of settings with a focus on university counseling.  He has held positions at Georgetown and Southern Illinois Universities, where he had the opportunity to work with hundreds of students needing short and long term therapy.  He enjoys working directly with clients in individual, family, and group therapy and employs an integrative approach to his therapeutic work. When not at Cornerstones he enjoys attending concerts at the Portland Symphony, working with Veterans, and spending time at home with his pet dog, cat, and chickens.

Gwen Tuttle, MSW, LCSW

Clinical Coordinator


Gwen is a licensed clinical social worker with over a decade of experience and training in clinical social work. She has completed internships in both Oncology and Outpatient Psychiatry where she attained specialized training in grief and loss, medical social work, and psychotherapy. While Gwen is trained in DBT, CBT, and Motivational Interviewing techniques, she believes in holistic individualized treatment of mental health and substance use issues that focuses on the “whole” person. Gwen uses a client-centered and trauma-informed approach to treatment, drawing on the strengths of the individual to move collaboratively toward successful treatment outcomes. Previously, Gwen has served as Clinical Director of Case Management Services for adults with mental health issues in Portland, ME and is currently committed to volunteering in her local community. Gwen has also dabbled as a stand-up comic

Rana Dagher, MD

Consulting Psychiatrist


Rana is a board certified psychiatrist who received her MD from Brown University Medical School. She has over 17 years of experience practicing in both hospital and outpatient settings. Rana specializes in Borderline Personality Disorder, Post Traumatic Stress Disorder, ECT, the treatment of opiate addiction, and Dialectical Behavior Therapy. She has organized and spoken at the Psychiatry Lecture Series for Brown University medical students and provided clinical supervision for medical students at Acadia Hospital in Bangor, Maine. Additionally, Rana has published research on the psychiatric treatment of Schizophrenia.

Rana works with our residents on a monthly basis providing psychiatric evaluations and medication management as needed. She also participates in our clinical team meetings at our program houses. She is a dedicated and integral part of our program and provides exceptional treatment to our residents. for her patients and is exceedingly generous in the financial accessibility of her services. She is fluent in English, French, and Arabic.

Kate Mills, PMHNP

Consulting Psychiatric Nurse Practitioner

Kate is a Psychiatric Nurse Practitioner and U.S. Army veteran. She received her Bachelor of Science in Nursing from University of Southern Maine and her Master of Science in Nursing from Vanderbilt University School of Nursing. Kate has delivered care across the spectrum of acute and ambulatory practice environments to patients of all ages. She specializes in trauma-informed, recovery-oriented psychiatric evaluations, medication management, and supportive therapies.

Kate particularly enjoys working with emerging adults as she regards this period of development as both fraught with challenges and full of opportunities for exploration and growth. Curating a personalized treatment in response to her patient's individual challenges, she endeavors to foster self-determination, personal fulfillment, and meaningful relationships. She bring a wealth of clinical expertise and an outstanding capacity to support individuals towards discovering their own values, meaning, and identity.

How to Apply

Please contact Aaron Rumsey
with any questions or to start
an application to our program.
He can be reached at

(800) 588-6898.

You can also find information on getting started HERE




Mailing Address
Cornerstones of Maine

Po Box 1834

Kennebunkport, Maine 04046

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