[1][2] She earned two postgraduate diplomas, in Information Science from the City University of London in 2003 and in Voluntary Sector Management from Cass Business School in 2011.

[7] As Director of Education at the British Science Association, Mathieson coordinated outreach activities for school teachers and their students.

[9] In 2015 she joined the King's College London Youth Access and Equity Research and Practice Agenda.

[13] She launched Not Just for Scientists a campaign that looked for "ideas from people who would like to contribute to debate about science’s role in society".

[16] In 2018 she became concerned that Brian Cox and David Attenborough did not make science accessible to all of the general public.