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Marlena Efstratopoulou has a strong background in risk management and information security. Marlena is currently serving as the Chief Risk Officer (CRO) at Options Technology. Prior to their current role, Marlena held the position of Chief Information Security Officer at Fixnetix Ltd from 2019 to 2021. Marlena also worked as a Security Consultant at DXC Technology from 2017 to 2021 and as a Cyber Security Consultant at Hewlett Packard Enterprise from 2013 to 2017. Additionally, Marlena has experience as a Co-writer at the University of Westminster in 2011.

Marlena Efstratopoulou completed their education in a chronological order. Starting in 2006, they attended Moraitis School where they pursued an International Baccalaureate degree, which they completed in 2008. Following that, they enrolled at UCL from 2008 to 2012 and obtained a Bachelor of Science (Honors) degree in Mathematics with Economics. Lastly, in 2012-2013, Marlena attended Royal Holloway, University of London, where they earned a Master of Science degree in Information Security.