[10] She created Toi Toi, a festival series of operatic club nights held at the CLF Art Cafe in Peckham, London; and Formations Masterclasses, a series of workshops that commissioned and staged new operas, with sessions led by figures from the opera world including Janis Kelly, Judith Weir, Mark Wigglesworth, Kasper Holten, Daniel Kramer, Robert Saxton, Stephen Unwin, Stephen Barlow, Stephen Medcalf, David Pountney, and David Parry.

[11] Formations Masterclasses were hosted by English National Opera and King's College London.

[8] She was artistic resident at Banff Centre for Arts and Creativity[29] and Dutch National Opera.

[30] Marchment is a co-founder of SWAP’ra, an opera-based charity that works to address the under-representation of women in senior leadership roles in opera.

[37] In 2018 and 2022 she was a semi-finalist in the European Opera-Directing Prize, and in 2018 she was shortlisted for the Women of the Future Awards in the arts and culture category.