Massi Joseph 'Joe' E. Kiani is an Iranian-born American engineer, entrepreneur, and billionaire Founder of Masimo (NASDAQ: MASI), a major medical technology company, and Willow Laboratories. Born in Shiraz, Iran, in 1964, he immigrated to the U.S. at age nine, speaking no more than three words of English.

Kiani displayed exceptional academic ability, graduating from high school at age 15. He earned a B.S.E.E. and an M.S.E.E. in Electrical Engineering from San Diego State University by age 22. His pivotal moment came in 1988 while consulting for a medical company: he discovered the motion artifact and low perfusion problems with traditional pulse oximeters (a vital patient monitoring device), an issue the company declined to fix.

• Masimo (Founder & Former CEO): The core publicly traded asset, a global medical technology company specializing in advanced signal processing and noninvasive patient monitoring (employed over 8,000 people globally). He resigned as CEO in 2024.
• Medical Innovation: He and his partner invented measures through motion and low perfusion pulse oximetry (Masimo SET), reducing false alarms by over 90 percent and improving patient safety.
• Advocacy: He is a major advocate for U.S. health care reform and patient safety initiatives (testifying before Congress).
• Civic Role: He was appointed by President Joe Biden to serve on the President's Council of Advisors on Science and Technology (PCAST) in 2021.

Joe Kiani founded Masimo in 1989 with the vision of solving the pulse oximetry problem. His strategic genius was his commitment to technological precision and patient safety. Masimo SET pulse oximetry has been proven to outperform other technologies in over 100 studies, used to monitor over 200 million patients worldwide. Kiani holds more than 500 patents or patent applications.

His career is also defined by his civic activism: he successfully fought against anti-competitive practices by Hospital Group Purchasing Organizations (GPOs), forcing new codes of conduct that enabled innovative companies like his to enter the market. In September 2024, following an activist investor campaign, Kiani resigned as CEO and now leads Willow Laboratories, a health and wellness innovator focusing on diabetes. His legacy is one of innovation, integrity, and patient advocacy.

Dr. Joe Kiani's social impact is massive and humanitarian, tied to Masimo SET pulse oximetry which reduced false alarms by over 90 percent and is used to monitor 200 million patients worldwide. His advocacy for GPO reform structurally opened the medical device market to innovation.

He co-created A Starting Point, a video-based civic engagement platform, with actors Chris Evans and Mark Kassen. The Masimo Foundation focuses on ethics, innovation, and competition in healthcare.

Joe Kiani maintains the professional, composed style of a technology executive. His attire is consistently formal and high-quality, favoring tailored suits. His aesthetic reflects stability and intellectual authority, rooted in his engineering expertise and patient safety mission.

Residing in Irvine, California, his luxury is the immense security and financial reward derived from his multi-billion dollar fortune. His life is dedicated to medical technology innovation, patient safety advocacy, and civic engagement.