Lynn’s professional life in mathematics education is driven by her passion for both the subject and the capacity of people to learn it successfully. She is a nationally well-known and regarded figure in the mathematics education field, and has since 2007 been the Chair of the National Association of Mathematics Advisers (NAMA), a professional Association for mathematics education Advisers, Inspectors and Consultants.

She is the Director of the National Mathematics Partnership and has been a member of the Association of Teachers of Mathematics since 1980. She has been both an Adviser and a Consultant to the National Centre for Excellence in Teaching Mathematics (NCETM), a Director of Mathematics at ARK Schools, a Specialist Adviser of Mathematics to Ofsted from 2001 to 2006 and the Principal Manager for the Mathematics Team at QCA from 1998 to 2002.