Marianne studied at the Welsh School of Architecture in Cardiff, graduating in 2007. She worked at practices in Essex and London, including Wright & Wright Architects, prior to joining Walters & Cohen in 2010.
Marianne has worked predominantly on independent secondary schools: the new entrance building for Ryde School on the Isle of Wight, the visual and performing arts centre at the Lady Eleanor Holles School, and the arts building for the American School in London. She is currently project architect for the project at Reigate Grammar School in Surrey.
Marianne completed her Part 3 at the University of Westminster in 2011, and was made an Associate in 2014.