De Bruin has taught courses and supervised research projects on a wide range of topics in business ethics, corporate social responsibility (CSR), business and human rights, and sustainability, and he has consulted to and/or taught incidental programmes for Achmea, Atradius, the Dutch tax office, Rabobank, DSI, ING, PFZW, PriceWaterhouseCoopers, the The Royal Netherlands Institute of Chartered Accountants (NBA), AOG School of Management, Comenius, Judge Business School (Cambridge), and Blavatnik School of Government (Oxford).

De Bruin's current work is on ethical and legal aspects of business, sustainability, and climate change. (See, e.g., a contribution to the celebration of the 40th anniversary of the Journal of Business Ethics on climate change, business and human rights.) De Bruin has also worked on the ethical, political, and legal aspects of information (epistemic injustice, ethics of belief, virtue epistemology, stereotypes, etc.), with applications in finance, health care, ICT, among others. (See, e.g., The Business of Liberty: Freedom and Information in Ethics, Politics, and Law  (Oxford University Press, 2022) and Epistemic vice predicts acceptance of Covid-19 misinformation  (with Mark Alfano and Marco Meyer), Episteme, 2021). He has also worked on ethics management in organizations (e.g. banker’s oath, bankierseed), and the foundations of liberalism and republicanism, with applications to privacy, marketing regulation, media violence, etc.

De Bruin holds master’s degrees in mathematics and philosophy (University of Amsterdam), and a PhD degree from the Institute for Logic, Language and Computation (Amsterdam). He also studied musical composition at the Academy of Music (Enschede, one-year talent programme). De Bruin held visiting positions at Cambridge University, the Fondation Maison des sciences de l’homme in Paris, Harvard Business School, UC Berkeley, University of Minho, University of Gothenburg, and is a Life Member of Clare Hall (Cambridge).

De Bruin is currently directing a research programme financed by the Dutch Research Council (NWO) on Fake news, sexist stereotypes, and other non-evidential beliefs: Philosophical theory and empirically tested solutions.

De Bruin is the author of numerous academic papers, op-eds and blogs, and has published monographs titled Explaining Games: The Epistemic Programme in Game Theory (Springer, Synthese Library, 2010), Ethics and the Global Financial Crisis: Why Incompetence is Worse than Greed (Cambridge University Press, 2015, pbk 2017), and The Business of Liberty: Freedom and Information in Ethics, Politics, and Law  (Oxford University Press, 2022). With Christopher F. Zurn, he has edited New Waves in Political Philosophy  (Palgrave, 2008).

De Bruin is the recepient of a Veni grant (Dutch Research Council, NWO) for a project on Recognition and Republicanism. He also obtained funding from NWO for a project on The Epistemic and Rationality Assumptions of Game Theoretic Solution Concepts (one PhD student); Ethics and Game Theory (one PhD student); Shared Commitments and Common Knowledge: The Epistemic Dimensions of Deliberative Democracy (two PhD students and two postdocs, with an empirical study of neighbourhood safety, with Martin van Hees (Vrije Universiteit Amsterdam); for a collaborative project on Trusting Banks (two PhD students, two postdocs, with an empirical study of epistemic virtues, with Alex Oliver, Cambridge); a project Towards Professional Epistemic Justice: Finance and Medicine (two PhD students, one postdoc, with Miranda Fricker); and a project on Fake news, sexist stereotypes, and other non-evidential beliefs: Philosophical theory and empirically tested solutions (three postdocs). Digitale Pioniers financed a project Moira Search: The Inverted Search Engine, with artist Saskia Korsten.