Medical Staff

Natasha is a highly skilled Family Nurse Practitioner with over 12 years of diverse nursing experience, predominantly in the Intensive Care Unit (ICU) with a focus on cardiovascular and cardiothoracic surgery. The majority of her career was spent as a travel nurse, where she honed her expertise in critical care at some of New England's most prestigious hospitals, including Massachusetts General Hospital, Brigham and Women’s Hospital, Dartmouth Hitchcock Medical Center, Lahey Clinic, and Maine Medical Center, the state's only Level 1 Trauma Center. Her meticulous attention to detail and advocacy for patients unable to voice their needs have been hallmarks of her practice.

As a board-certified nurse practitioner, Ms. Williamson is deeply committed to mental health and addiction medicine, a passion reflected in her educational background. She earned her Bachelor of Science in Nursing (BSN) from The University of Southern Maine in 2013, with minors in biology and holistic health. She completed her Master of Science in Nursing (MSN) at Walden University in 2018, graduating summa cum laude. Her academic journey included specialized courses in mental health, exceeding standard requirements, which laid the foundation for her work in addiction medicine. Since 2020, she has been actively involved in Medication-Assisted Treatment (MAT), bringing her extensive experience and compassionate approach to this vital area of healthcare.

Jennifer Steffen, NP

Born and raised in Southern Maine, Jennifer obtained her RN degree in 1989 and enjoyed a very rewarding career as a bedside nurse for almost 20 years. Feeling as though she could do so much more, Jen made the decision to obtain her NP degree from Boston College with Masters in Nursing and Women’s Health in 2015, earning the tools to help people maximize their knowledge and strengths in order to better navigate the challenges of healthcare. Jen maintains an individualized lens for each person, providing education and encouraging shared decision making to create an effective patient-provider relationship.

In addition to her work at Grace House, Jen also works at a local OB/Gyn office in Portland providing a full range of preventative and problem-based care. In her free time, she enjoys live music with her 2 teenaged children, travel, and any activity that involves nature and time with family and friends.

Annah Levasseur, LADC, CCS, LMSW-CC

Clinical Director

Annah is a seasoned behavioral health professional and Clinical Director with over eight years of experience supporting individuals and families impacted by substance use disorders. She holds a Master’s Degree in Social Work from the University of Southern Maine and is credentialed as an LMSW-cc, Licensed Alcohol and Drug Counselor, and Certified Clinical Supervisor. Grounded in a strengths-based, trauma-informed framework, Annah specializes in group therapy, cognitive behavioral interventions, motivational interviewing, and integrated family work. She is committed to providing inclusive, person-centered care that respects each individual’s lived experience and unique path to recovery. She is particularly passionate about supporting women and underserved populations, creating spaces where individuals feel seen, empowered, and respected. Her approach emphasizes collaboration, resilience, and the belief that meaningful change is possible when individuals are supported with empathy and dignity. Her path into the field was shaped by personal experiences witnessing the effects of addiction on loved ones. These experiences inspired her to pursue a career rooted in advocacy, healing, and systemic change. She is deeply invested in mentoring emerging professionals, fostering clinical excellence, and leading with empathy, integrity, and cultural humility. 

Ashley Johnson, ADCA

Recovery Coach and Program Director

Ashley is a dedicated to supporting women on their journey to healing and self-discovery. Ashley brings both professional insight and personal passion to her work in the recovery field. She has dedicated her career to creating safe, supportive spaces where women can rebuild their lives, rediscover their self-worth, and pursue lasting recovery. Her leadership is rooted in compassion, accountability, and empowerment.  Ashley continues to inspire others through her commitment to recovery, advocacy for women's wellness, and belief that every woman deserves the opportunity to heal and thrive.

“Watching women grow in confidence and self-love through hard work and dedication is the most powerful and fulfilling experience I’ve ever had.” — Ashley

Lynn Manderson

In my 20-year practice as a licensed drug and alcohol addiction counselor I have seen how the unresolved trauma can contribute to relapse. But I have seen how well-paced trauma interventions based in somatic therapies can move clients into healing as they gain the ability to trust their clinician, who provides a consistently safe space for comfort as they share the uncomfortable. Honoring their journey is the greatest gift , and kindness embodies all connection that works to create new lives by their own design and often a miraculous transformation that the both of us are amazed by.

I believe it is important to study all co-occurring systems and how they operate to better understand how addiction prolongs ongoing suffering. I also play music with 5 CDs released out of Nashville, as a lead guitar player and slide virtuoso and have used music to engage happiness and bring spiritual energy into lonely energy with faith for the faithless. Recently I became a certified Career coach to further my goal of leading clients into the vision for their life.

Jenn has been working with and supporting women as a social worker and advocate for over 20 years. Her background includes education and advocacy for a Domestic Violence Resource Center, case management and reentry for the Maine Department Corrections and York County Jail, and substance use counseling with several recovery programs. She lives in Waterboro with her husband, two children, two dogs, a cat, and a gecko. Jenn is excited and honored to be a part of the team at Grace House.

Shelby Klimas, CADC, is a Certified Alcohol and Drug Counselor with a strong dedication to supporting individuals on their recovery journeys. With experience in both detox and women’s residential treatment settings, Shelby has facilitated therapeutic groups, provided one-on-one counseling, and supported clients through early recovery using a compassionate, evidence-based approach.

Shelby practices from a trauma-informed, strengths-based lens, and frequently incorporates Motivational Interviewing to help clients explore their values, build insight, and strengthen motivation for change. She is especially passionate about working with women navigating emotional dysregulation, complex family dynamics, and relapse prevention.



Grounded in her own journey, Shelby feels deeply honored to walk alongside women in recovery. She brings warmth, empathy, and a nonjudgmental presence to each interaction and is committed to continual growth in the field of substance use treatment.

Victoria is a dedicated substance use disorder counselor at Portland Recovery Group, a women’s treatment center providing trauma-informed, gender-responsive care. She is passionate about supporting women in reclaiming their lives from addiction and helping them build a foundation for lasting recovery.

With experience in residential settings, Victoria specializes in facilitating individual and group counseling sessions that focus on relapse prevention, emotional regulation, and healthy relationship-building. She frequently incorporates evidence-based approaches such as Cognitive Behavioral Therapy (CBT), Motivational Interviewing (MI), and Dialectical Behavior Therapy (DBT) skills training to address the unique challenges women face in early recovery. She frequently merges her spirituality to embolden clients to self-discover their personal development.

Victoria is especially committed to creating a safe, supportive environment where clients feel empowered to process past experiences, navigate relationship dynamics, and develop coping strategies for long-term sobriety.

Kristina Reynolds

I enjoy giving back to a program and community that helped me. Working with women in early recovery is incredibly rewarding. My approach is meet these women where they're at on any given day with love and compassion. It's a blessing to be able do this work.