Marci Shimoff
#1 New York Times Best-Selling Author and Expert on Happiness, Success, and Unconditional love

Sima Sistani is a serial entrepreneur, executive, and educator. A Duke University alumna, she earned an MBA from Northwestern University and built a career at the intersection of media, technology, and consumer platforms. She co-founded and served as CEO of Houseparty, the viral video-chat app popular during the pandemic, which was acquired by Epic Games in 2019.
In March 2022, she became CEO of WW International (WeightWatchers), where she boldly pivoted the legacy diet company toward embracing GLP-1 weight-loss drugs like Ozempic and Wegovy by acquiring a telehealth platform. She departed as CEO in September 2024 after about 2.5 years.
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Looking to book Sima Sistani for your next event? As a Serial Entrepreneur, Former CEO of Weight Watchers, Co-Founder and CEO of House Party & Adjunct Professor at Duke University, Sima Sistani brings a powerful story and engaging presence to corporate events, conferences, leadership programs, charity galas, and special appearances. Speaking fees for Sima Sistani vary based on event location, type, and duration. Speaker Booking Agency offers transparent pricing and will provide a detailed quote tailored to your event needs. To check availability, request a quote, or learn more about booking Sima Sistani, contact Speaker Booking Agency at 888-752-5831 or submit a booking request.
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#1 New York Times Best-Selling Author and Expert on Happiness, Success, and Unconditional love
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