Isabel’s technical work at TWI focuses on the development of analytical flaw assessment techniques, and their application to safety-critical structures and pressure equipment. Chairing the committee that develops and maintains BS 7910 (UK flaw assessment procedure), Isabel is also a member of the R6 (UK nuclear assessment procedure) panel and a co-author of the European FITNET fitness-for-service procedure.

In 2016, Isabel took up the additional role of Royal Academy of Engineering Visiting Professor in Integrity Management at the University of Bristol, an initiative aimed at enhancing the employability of new engineering graduates through exposure to industrial problems and practices.