Sheena Zadeh, known online as @sheena, is a 38 years old entrepreneur, model, and social media star based in Los Angeles and the founder of Kosas, a clean beauty brand she launched in 2015. With a strong passion for skincare and makeup, she blends science and creativity to build products that are loved by fans and celebrities like Hailey Bieber and Kylie Jenner.
Childhood and Family
Sheena Zadeh was born in 1987 and grew up in California, USA. Her ethnicity is Iranian, and her mom worked at a Clinique makeup counter — a job that played a big role in sparking Sheena’s early interest in beauty. Now a mom herself, she has a 10-year-old daughter [Electra] and enjoys a private family life in Los Angeles. She focuses more on her work and what she’s building with Kosas than on sharing too many personal details online.
Educational Qualification
She has a strong background in science. She earned her Bachelor’s degree in Biological Sciences from UC Irvine between 2001 and 2005, then continued her education at Chapman University from 2008 to 2010.
Career
Before diving into the beauty world, she worked as a microbiologist. It was this science experience, plus her artistic side, that helped her launch Kosas in 2015, starting with just four lipsticks from her kitchen table. Today, Kosas is a well-known name in clean beauty, with products like the Revealer Concealer, Wet Lip Oil, and BB Burst, sold at big retailers like Sephora and Credo.
On Instagram (@sheena), where she has 42.7K followers, she shares everything from new product launches to personal moments. One post from November 2024 highlighting the Revealer Concealer got 10K likes, and a travel reel from Dubai in September 2024 pulled in 8K likes.
She’s also active on Threads (@sheena) with about 5K followers, where she drops short updates, like a quick skincare tip in January 2025 that drew 1K likes. On LinkedIn, she keeps it professional, sharing big milestones like Kosas’ 2024 launch in Sephora Middle East.
Her work with Kosas takes her all over the world — from Dubai to London to Malaysia — for brand events and store launches. One of her most popular Instagram posts was from Sephora Dubai in September 2024, which earned 12K likes and gave fans a peek at Kosas’ growing global presence.
She believes in natural, glowing skin and draws inspiration from Middle Eastern self-care rituals she learned growing up. Her routine includes yoga (Hatha and Anusara styles), walks, and skincare favorites like Kosas DreamBeam SPF and Plump + Juicy serum.
Kosas has also picked up serious momentum thanks to viral content and celebrity shoutouts. One video in July 2024 on the @kosas TikTok — where Sheena applied Wet Lip Oil — hit 1 million views.