Holland Therapists

Leslie (Bolt) Roberts, PhD, LP, LPC | Founder & Owner

Leslie is passionate in providing the highest level of psychological treatment, assessment, and consultation services to children, teens, adults and families. 

Daniel Bierma, MEd, MDiv, LMSW

Dan has been working with children, families, and organizations for over three decades in various forms from children with special needs, to teaching, to hospice care, to working in schools and organizations…

Ashton Campbell, MA, LLPC

Ashton is a professional counselor who enjoys using his knowledge and gifts to impact children and teens. He believes that improving the lives of our youth not only increases their present quality of life…

Philip M. Elzinga MA, LLP, CAADC, NCC

Phil worked in a technical field for many years before returning to school to obtain a Bachelor of Arts from Cornerstone University and a Master’s Degree in Community Counseling…

Erin Heavilin, NP| Prescriber

Erin Heavilin is board certified Psychiatric Mental Health Nurse Practitioner with ten years of experience working in the mental health field. Erin received her undergraduate nursing degree…

Greg Korzenowski, PhD, LP

Dr. Greg is a clinical psychologist with over 50 years of experience in providing health care services as a registered nurse, a doctoral-level psychologist, and a university educator.

Mary Mooi, LMSW

Mary, a native Michigander, returned to Holland a few years ago with her husband after living in Northern Indiana for nearly 20 years.  Mary received her Bachelor’s degree in Social Work from Michigan State University.

Sandra Morris, MA, LLP

It has been Sandra’s pleasure to work in the field of Human Services for over 20 years. During this time, she has worked with dynamic and diverse groups of people. Her goals and passions are to assist people from all walks of life…

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