Meet Our Clinicians

Our Therapists

Mariann  Federspiel, Licensed Professional Counselor

Mariann Federspiel is a Licensed Professional Counselor and Certified Rehabilitation Counselor who works with children, adolescents, and adults; specializing in the psychosocial impacts of mental, physical, and developmental disabilities. She provides a strength-based approach to managing symptoms, increasing quality of life, and maintaining emotional well-being. 

Lesa Stewart, Licensed Master Social Worker

Lesa Stewart is a licensed master social worker (LMSW) providing therapy to children, adolescents and adults. Lesa graduated from the University of Idaho with her bachelor of science in psychology and received her master's degree in social work from Boise State University. Prior to joining the Big Lake team, Lesa spent eight years working with children, adolescents and adults at the inpatient behavioral health unit at Kootenai Health. Lesa is passionate about working with individuals and families struggling with a wide variety of mental health concerns. Lesa believes change is always possible and that each client's healing comes from within themselves.

Outside of the office, Lesa enjoys spending time with her husband, adult and teenage kids, and 3 dogs. A native to North Idaho, she enjoys anything outdoors and is a die-hard Chicago Bears fan.

Antoinette Wilton, Licensed Master Social Worker

Antoinette (Toni) Wilton is a Licensed Master Social Worker, specializing in individual, children and family therapy. Toni has over 15 years’ experience providing behavioral intervention therapy to individuals with neurodevelopmental disabilities such as autism spectrum disorder, ADHD and ODD and 5 years working with individuals, children and families with mental health diagnoses.


Toni graduated with her Bachelor of Science in Psychology from Boise State University and received her Master’s in Social Work at Eastern Washington University. While working on her Master’s degree Toni was able to complete her practicum at an adoption agency in Spokane that specializes in Attachment disorder. Toni learned the intricacies of attachment and has a passion to help facilitate healing for those who struggle with attachment disorders. Prior to joining the Big Lake team, Toni worked with individuals with neurodevelopmental disabilities and provided mental health counseling to individuals, children and families.  Toni utilizes various strength-based and cognitive-behavioral therapeutic techniques.