Team Bios

Daniel T. DeBaun
Co Founder & CEO

Daniel is an internationally recognized and influential expert in shielding electronic emissions and Electromagnetic Radiation (EMF) protection, with particular focus on the effect of exposure from mobile devices such as laptops, tablets and cell phones. Daniel’s concern regarding the health impact of electronic radiation emissions grew from over 30 years of engineering experience in the telecommunications industry where he held a variety of leadership and executive positions at SAIC, Telcordia, AT&T and Bell Labs.

Through the course of his career, Daniel has created requirements for large telecommunication systems, led technical divisions responsible for establishing industry standards and formed analysis adherence testing for next-generation digital transmission systems. Daniel also oversaw laboratories which analyzed electromagnetic radiation (EMF) interference, electrical signals and digital formats. He and the teams he led were looked upon as industry authorities.

Daniel is the inventor of DefenderShield®, the most effective EMF radiation protection technology for mobile devices ever developed. In addition to his work with DefenderShield®, Daniel is a highly-regarded industry consultant, writer, and speaker as well as frequent guest national radio and television programs discussing EMF heath issues.


Ryan P. DeBaun
Co Founder & COO

Ryan is a proven innovator specializing in creative development and communications. As co founder of DefenderShield®, he leads operations and strategy, leveraging his unique and vast experience across all aspects of business, media and technology,

Throughout his career, Ryan has held many roles including manager, producer, creative director, designer, and writer for many of the largest media companies in the world including HBO, CNBC, Cox, CBS, and ABC.

With a passion for health and wellness, Ryan is considered an industry leader, educating worldwide communities about EMF and its potential health issues, while driving the development of the most effective shielding solutions ever produced.


Ann Castellani
Business and Customer Service Manager

Ann has worked in a variety of diverse fields from the not-for-profit to political to the health and wellness industry. She is passionate about health and the holistic well-being of herself and others. During the last 10 years, she has been researching alternative health practices and the dangers of our daily exposure to environmental toxins which compromise our health in today’s world.

Ann is thrilled to join the team at DefenderShield®, because she has been aware of the risks of EMF radiation exposure and searched for a valid solution that will actually protect the individual when using their technology. She has found it with DefenderShield.

Ann holds two Bachelor of Science degrees in Business Management and in Business Leadership. She is joining the team as Business and Customer Service Manager, where she will get to share her excitement for the product with DefenderShield customers.

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