At age 21 years old, Marine was the youngest gallery manager in Europe when she managed the gallery of Steve Lazarides who discovered Banksy. At 23 years old, she was approached by a US investor to open her first art venture in Los Angeles, De Re Gallery (named after the island she came from in France) on Melrose Avenue. The gallery launched with several celebrities and mega collectors like Demi Moore. It's in Los Angeles that Marine had the idea to build the very first talent agency in the art world, mimicking the top talent agencies like CAA, UTA and WME. Marine launched Certified B Corporation, MTArt Agency in London, in 2015, when she was 25 years old. 

Today, MTArt agency is the art sector's leading talent agency representing some of the most talented, forward-thinking artists in the world with a track record of delivering over 300 projects across major global cities, brands, and institutions. MTArt Agency was listed on the Sunday Times Power list. MTArt Agency has been supported by a number of established investors and funds, including Frederic Jousset, Todd Ruppert, Simon de Pury and Local Globe. 

In 2025, she also co-founded Urban X Culture, a cultural agency with Sherry Dobbin (Founder, Midnight Moment /Times Square Arts), and Patrick Foret (Former Director, Art Basel and Art Basel Cities). 

Marine is a passionate advocate for the role of the artist in our society, she wishes for art to become a part of our everyday experience. She published her academic papers with Warwick University and UCL supporting a new way to value public art projects within cities. She also published her first book with Penguin encouraging a more active participation in our visual culture, all the while teaching visual literacy. Her talks include four TEDx Talks on how to transform cities with art, how social media visuals affect our minds, how harmful are the visual biases we see daily and visual economics. She has also contributed to the Universal Declaration of Cultural Diversity by UNESCO. 

She is special advisor to the UN Women UK and is on the SXSW Festival Advisory Board in London. 
She is an investor in art & tech companies like exactly.ai and icon.desk. 

Marine was awarded Forbes 30 under 30 Europe, UK entrepreneur of the year for the NatWest Awards and Great British Entrepreneur 2025. She was awarded the Champion of Empowerment Medal for her leadership in empowering artists and creatives by the Parliamentary Society of Arts and the Outstanding Achievement Award 2025 by the Creative Women Platform.