Zein grew up in Hong Kong and completed her tertiary education in the UK. She returned to Hong Kong to teach in 2001. In 2003 Zein accepted a teaching position with Child Welfare Scheme (CWS), an NGO based in Nepal. After this Zein set up the CWS HK office where she spent 14 years fundraising for education followed by a year teaching English to young adult refugees. Apart from being an integral part of the teaching team at Silvermine Bay School, Zein is well known in Hong Kong for being a highly successful athlete. Zein has been a Class Teacher at Silvermine Bay School for four years.