Arbitrators form the cornerstone of the international commercial and investment arbitration regimes. In an age of globalized business, the path to becoming an international arbitrator, analysed from a legal profession perspective, is a growing area of interest. This study, using an interview-based methodology, seeks to shed light on the process of becoming an international arbitrator today. The focus is primarily on independent arbitrator practices, which consist of individuals who are not associated with a firm but might be affiliated with a barrister or arbitration chambers, and who dedicate the majority of their professional activity to sitting as an independent arbitrator in both the commercial and investment arbitration contexts. It analyses the reasons that motivate individuals to go ‘solo’ and the challenges that these individuals face after founding their practices. Additionally, information on the economics of an independent arbitrator practice and the management of case flow is provided. Through their interviews, respondents provide tips on business development and growth of successful independent arbitrator practices. This information is then analysed to provide key takeaways on the business models of modern international arbitrators. Finally, the study offers insights on the impact of these independent arbitrator practices on the questions of diversity and double hatting in international arbitration.