After a successful career as a science teacher and middle leader in some of the UK's toughest secondary schools, Marius became Headteacher of Bedminster Down Secondary School in Bristol. Despite being placed in the bottom 200 performing secondary schools in the country in 2000, Marius led the school community through a remarkable transformation, trebling performance outcomes within a decade. In 2010, he became CEO of ASDAN Education, a large curriculum development charity and awarding organisation. Following this, in 2011, he won Human Resource Magazine’s Most Person-Centred CEO of the Year award.

Marius joined Achievement for All in 2015 and is our strategic lead for E-Learning and Material Development. As part of this role he leads content development for the charity's innovative online resource portal, The Bubble.