Marlies de Vries is specialized in Internal Control. Her main interest is in how organizations balance their controls between formal ('hard') and informal ('soft') controls within today's complexities such as globalization, new organizational forms, the rise of integrated reporting, etcetera. This academic and practical interest is incorporated in her teaching within the Nyenrode Executive Programs (masterclass Internal Control and 'Toezicht op Integriteit') as well as the degree programs (Accounting & Controlling).
Her main topics include: Socialization Processes and Sociological Controls (PhD thesis in progress), Organizational Culture, Corporate Governance, and postmodernism. Furthermore, she is a member of the Nyenrode Corporate Governance Institute, via her knowledge and background in Internal Control she actively contributes to the discussion on Corporate Governance. 
Marlies has broad experience as a public auditor. From 1997–2011 she joined PricewaterhouseCoopers (most recent job role was senior manager), with experience in both the profit sector (listed and unlisted companies) and non-profit sector (education and charity). In 2004 she worked on an assignment of the Worldbank concerning the Afghanistan Reconstruction Fund, located in Kabul (Afghanistan) and the Netherlands. From 2006-2008 she was a project manager for a member of the Board of Directors of PricewaterhouseCoopers Auditors.