First Sentinel has assembled an excellent team of experts and advisors with a wide range of experience in home safety alarm systems, medical alert devices, personal emergency response systems, and personal safety apps.


Thomas Rankin

Thomas (Tom) Rankin has devoted over 30 years to the safety and security industries. One of the founders of Protection One as well as other well-known alarm and personal safety system companies, Tom has spent his career focused on the safety and security of thousands of people throughout the United States, with an emphasis on personal emergency response systems and medical alarm systems for seniors, children, and other vulnerable individuals. Tom earned an MBA from the UCLA Anderson School, has served on the Advisory Board of the California Bureau of Security and Investigative Services, and is currently President of the Greater Los Angeles Security Association.

Lyssa Rankin

An eight-year veteran of the Security Industry and recent graduate of UCLA, Lyssa Rankin has had first-hand experience of the challenges that young people face, especially at college campuses. Better than anyone, Lyssa understands the benefits of personal safety equipment and safety alert systems for children, runners, and college students. Lyssa has also led marketing and leasing efforts at high-end residential projects in downtown Los Angeles and San Francisco.


Rhonda Rhyne

Currently CEO, President, and Board Member of Prevencio, Inc., a developer of cardiac proteomics blood biomarker test technology, Rhonda Rhyne is a true leader in the world of medical technology advancement. Also a founder and President of Cardiodynamics and ReJuVey, Rhyne has been named Entrepreneur of the Year - Medical Products by Ernst & Young, winner of the Individual in BioSciences Award, Athena Pinnacle, and winner of Deloitte's 50 Fastest Growing Tech/Life Science Companies Award for nine consecutive years.

Shannon Tulluss

An award winning and published 20 year leader of the private investigator industry, Shannon Tulluss has served as the District Governor for the California Association of Licensed Investigators, led several other industry associations, and has twice been voted the No. 1 Private Investigator of the Santa Clarita Valley.

Rick Gombar

An extremely successful entrepreneur, Rick Gombar is the leading provider of insurance services to the Security Industry. Rick serves on many Boards and Associations, and is a critical advisor to many in the Security Industry.

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