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Medical & Scientific Advisory Board

Since founding DefenderShield, we have been extraordinarily fortunate to have built relationships with gifted health experts and leaders in their fields. Our customers consistently ask about the health effects from Electromagnetic Radiation (EMF), and we are able to convey accurate, cutting-edge knowledge due to our own research, and the relationships we have with medical practitioners and scientists.

The DefenderShield Medical & Scientific Advisory Board is comprised of functional neurologists, biochemists, chiropractors, sleep experts, and brain, eye and ear practitioners. These medical practitioners and biology researchers council us on the latest scientific laboratory findings and clinical observations. We have learned it takes a tribe to intelligently help guide our customers to shielding solutions and to help address underlying symptoms of EMF exposure.

Many of our advisory board members work directly with patients who are negatively affected by EMFs in their environment. They freely share their experience and knowledge with DefenderShield and their professional colleagues. They speak at health conferences and lecture in public forums as keynote speakers in local communities throughout the world. Most importantly, we share the same passion for educating the public about the dangers of EMF radiation and how they can protect themselves.

Board Members

Dr. Russell Kort

Dr. Russell John Kort, D.C.
Electromagnetic Hypersensitivity (EHS) Expert & Chair of the EMF Sensitivity Project

Dr. Russell John Kort is the clinical lead for DoctorEMF™. He is an author, public speaker, and has been named innovator of the year for BrainTap Technologies.

Dr. Kort believes that exposure to chemicals and pathogens (environmental toxins) the past twenty years has increased at an exponential rate, which corresponds with the advent and proliferation of wireless technology (technology toxins). There is a great need to educate on the global health issues associated with EMFs and the stress caused from these Environmental and Technological Toxins (ETT). Millions are suffering from unexplained neurological, neurobehavioral (anxiety, depression and PTSD), eye, ear, heart, sleep, and immune issues from environmental and technology toxins (ETTs). For the past three years Dr. Kort has focused on the neurological aspect, specifically concussion-like symptoms from EMF exposure. He teaches that all dis-ease is caused by stress from toxins, trauma and thought, based on Dr. Robert Naviaux’s groundbreaking model, the Cell Danger Response (CDR). When we are exposed to these cell danger stressor(s), biological responses occur sequentially. heart, skin, and immune issues.

DoctorEMF.com | 1.800.261.9267


Joanette Biebesheimer

Joanette Biebesheimer, MS

Joanette Biebesheimer has more than twenty-five years of experience in biochemistry, public speaking and technical sales. She is the principal lead for DoctorEMF™. She is a practicing biochemist with a Master’s degree in Environmental Science and Policy. She coordinates multiple medical disciplines to establish clinic protocols, starting with biomarkers, practices and procedures. Her primary area of research is psychoneuroimmunology, focusing on the biological impacts of EMF..

As a biochemist and a breast cancer survivor It has been her life’s work to bolster her families immune system, and to share these science-based strategies.

Biebesheimer’s integrative approach is to minimize cancer risks within the home: by assessing the EMF exposure, food, water, chemicals, supplements, health & beauty products, exercise and reducing stress.

DoctorEMF.com | 1.800.261.9267


Dr. Patrick K. Porter, PhD

Dr. Patrick K. Porter, PhD
Psychologist, Founder & Creator of BrainTap Technologies – Inventor of the BrainTap Headset

Dr. Patrick K. Porter, PhD, is an award-winning author, entrepreneur, and speaker. With 24 years of experience operating the largest self-help franchise, he has become a highly sought-after expert within the personal improvement industry. Today, Dr. Porter and his team of scientists and mindfulness experts are leading the way in brainwave entrainment technology. In the process, they’ve made BrainTap Technologies a global leader in the personal improvement field. With a library of more than 400 guided-audio programs (all voiced by Dr. Porter) and creative visualization processes, the BrainTap allows users to relax, reboot, and revitalize while achieving peak brain performance.

BrainTap Technology™, uses creative visualization and Relaxation to help people overcome stress and insomnia, lose weight, stop smoking, manage pain, accelerate learning, and much more.



Dr. Joe Zelk

Dr. Joseph Zelk DNP, FNP, BC, CBSM, DBSM
Clinic Director – Diplomat of the American Board of Sleep Medicine

Dr. Joseph Zelk DNP, FNP, BC, CBSM, DBSM is double board certified in Behavioral Sleep Medicine. He is a nationally known speaker on sleep disorders and cardiovascular disease. He has been an invited expert for sleep disorder related articles for the Nurse Practitioner, Journal of the American Academy of Nurse Practitioners and other periodicals.

Dr. Joseph Zelk is active in the development of novel mandibular advancement devices to help promote the field of oral appliance therapy for OSA. He leads the charge at The Sleep Medicine Group to be forefront of both oral appliance therapy and hybrid therapy of oral appliance/with positive airway pressure therapy.  He has also co-developed an Interdisciplinary algorithm for the treatment of obstructive sleep apnea and complex sleep apnea.



Dr. Leslie Russell-Martin

Dr. Leslie Russell-Martin
Licensed Psychologist, Clinical Neuropsychologist

Dr. Leslie is an American Association for Marriage and Family Therapy Clinical Member and Approved Supervisor. She is also an approved supervisor for the Minnesota boards of Marriage and Family Therapy, Psychology, and Board of Behavioral Health. Dr Leslie is also a Registered Play Therapist and Registered Play Therapist Supervisor.

Dr. Leslie’s specialties include Autism, trauma, TBI, neurological conditions, and Reactive Attachment disorders as well as infant and child mental health. One of the clinics, and Dr. Leslie’s, passions is to provide quality mental health care to children and families using both traditional and non-traditional therapeutic methods.

Dr. Leslie works with children and families as well as couples and individuals ages 18 months and up. She also completes neuro-psychological assessments for individuals ages 18 months through adult.



Dr. DeAnn Fitzgerald

Dr. DeAnn M. Fitzgerald, OD

Dr. Fitzgerald has been in the eye care profession for over 30 years. A graduate of the College of Optometry in Forest Grove, Oregon, she got into the profession because of her passion for helping people. “The eyes are the windows to the body,” she says. “So many things can be seen and diagnosed with a thorough eye exam.”

The doctor has been providing eye care to the Corridor community since she moved to Cedar Rapids in 1984. When asked about her future goals, Dr. Fitzgerald replies that they are, “To continue to grow and contribute through my passion for my career.” She currently offers patients examinations, diagnoses and treatments for the management of vision diseases and disorders. Dr. Fitzgerald is always investigating and investing in the latest eye care technology to provide the best state-of-the-art patient care possible.



Dr. John Catzanaro

Dr. John Catanzaro, NMD
Neo7Logix Founder & CEO

Dr. John A. Catanzaro, NMD, Neo7Logix Founder & CEO, received his Doctorate of Naturopathic Medicine from Bastyr University in 1995.

He has retired from clinical practice and was the former founder and CEO of the largest integrative cancer center in Seattle. He innovated patient-precision patient matched immuno-peptides and cell therapy to train defense cells to eradicate very advanced cancers considered incurable failing all conventional treatments with successful outcomes.

He also was affiliate / adjunct faculty for Bastyr University and taught integrative cancer outpatient medicine to medical students and resident physicians for 15 years. He served on Bastyr Institutional Review Board for 6 years. He was appointed by the Governor and served Washington Department of Health Quality Assurance Board for Naturopathic Medicine for five years as Co-Chair. He also served on the CDC Medical Board Cancer Commission representing Washington State for two years as a medical advisor on integrative cancer care. Dr. Catanzaro also was a former member of the American Association for Cancer Research (AACR).



Dr. Charles Shidlofsky

Dr. Charles Shidlofsky, O.D., FCOVD

Dr. Charles Shidlofsky graduated in 1988 from Southern College of Optometry in Memphis, TN and has been in practice for 30 years in the Dallas, TX area. He is a professor in the Colleges of Optometry at UIWRSO, Western University, and Southern. Through the Southern College of Optometry, he is the Residency Director for Neuro-Vision Associates of North Texas and is highly involved in the sports world as the Founder and Vice President of the International Sports Vision Association, Clinical Director for the Special Olympics and as the team Vision Coach/Eye Doctor for the Dallas Stars (NHL), FC Dallas (MLS), and Allen Americans (ECHL).



OnBaseU, RacquetFIt

Dr. Drake received his bachelor’s degree at Florida State University. He received his Masters in Sports Health Science with an emphasis in Sports Injury Management as well as his Doctorate in Chiropractic from Life University in Atlanta. Dr. Drake holds numerous professional certifications including Certified Chiropractic Sports Physician (CCSP) from the American Academy of Chiropractic Sports Physicians, Performance Enhancement Specialist (PES) with the National Academy of Sports Medicine, and specializes in human performance.