Skip to main content

Meet a Few of Our Experts

With over 500 staff and four locations in Michigan, we are large enough to be a leader in brain injury care, but small enough to know all of our patients’ names. We’re not an institution, we’re a family.

We ensure that everyone receives ongoing education and training relating to brain injury. Many staff whose positions do not require professional credentials have undergone hours of study and examination to become Certified Brain Injury Specialists (CBIS). We are proud of the significant expertise at Hope Network Neuro Rehabilitation – from our doctors to our administrators.


Martin Waalkes, PhD, ABPP
Rehabilitation Psychologist
Director of Neuro Rehabilitation

Martin Waalkes, PhD, ABPP | Neuro Rehabilitation

Dr. Martin Waalkes has been treating individuals faced with brain injury and spinal cord injury for over 25 years. He is a board-certified Rehabilitation Psychologist, as well as a Certified Brain Injury Specialist Trainer. Dr. Waalkes is responsible for the development of rehabilitation programming for our transitional programs at Hope Network Neuro Rehabilitation. He also leads the psychology department while continuing to provide behavioral evaluation, consultation, and support to patients and their families.

Deb Kushion, PT, DPT, NCS
Andy Wicks, PT, DPT, NCS
Physical Therapists

Deb Kushion, PT, DPT, NCS and Andy Wicks, PT, DPT, NCS | Neuro Rehabilitation

Drs. Kushion and Wicks have a combined 14 years of experience treating patients with acquired brain injuries. Both are Board Certified Clinical Specialists in Neurologic Physical Therapy. They join only three others with this advanced clinical knowledge and skills in physical therapy and neurology in the Grand Rapids area.

Robert Holwerda, DO

Robert Holwerda, DO | Neuro Rehabilitation

A licensed psychiatrist, Dr. Holwerda provides neuropsychiatric evaluation, consultation, and treatment to inpatient and outpatient participants who have behavioral concerns related to brain injury or other neurologic conditions. He has been sharing his expertise with patients at Hope Network Neuro Rehabilitation since 2002.

Cathy Flinton, BS, HTR, CBIS
Horticultural Therapist

Cathy Flinton, BS, HTR, CBIS | Neuro Rehabilitation

As a registered horticultural therapist, Cathy Flinton has the unique role of providing therapy in a peaceful, barrier-free greenhouse specifically designed to help individuals reach their therapeutic goals. She is also a Certified Brain Injury Specialist and has been working with patients at Hope Network Neuro Rehabilitation’s East Lansing campus since 1996.

Referrals and Admissions Process

Follow us