Meirion Prys Jones spent 18 years working in the field of  in education, in three secondary schools (10 years) and then as an educational consultant/adviser/inspector in a local authority in Wales. He also qualified as a Registered Inspector of Schools in Wales

In 1994 he joined the newly established Welsh Language Board, initially as Head of the Education Department, then as Chief Executive for 8 years. At the WLB he was responsible for 80 members of staff, in 14 offices in different parts of Wales, and for a budget of £13 million (16.5m euro)

In 2007 he was elected Chairman of the European Network to Promote Linguistic Diversity (NPLD) In 2012 he was appointed the Chief Executive of NPLD.