Tosos’s expertise spans vast fields across a range of traditional law disciplines (including public, private, company, environmental, labour and consumer laws) and involves interdisciplinary links to sociology, political economy, business ethics, management, development studies, international studies and area studies. Demonstrative of this is one of Tosos’s recent publications, Corporate Social Responsibility Across the Globe: Innovative Resolution of Regulation and Governance Challenges (CUP, 2023). He is also a qualified (non-practising) solicitor of England and Wales and a barrister and solicitor of Nigeria and has advised governmental and nongovernmental bodies.

Tosos’s significant contributions to the wider social sciences include the demonstration of the interoperability of law and other social science disciplines in identifying and addressing issues and challenges in local, national, regional and global societies. He has utilised doctrinal, theoretical, empirical, comparative, critical studies and interdisciplinary approaches in improving understanding of law, business and governance issues in specific local, national, transnational and digital environments. Tosos has applied legal research methodologies and mixed methods to contribute to academic debates, analyse legal and regulatory rationales and models, challenge orthodoxies and clarify linkages between areas of law and wider social sciences in different contexts. His research and publications highlight creative solutions to legal and regulatory issues confronting scholars, practitioners, businesses and policymakers.