Jefferson Pereira is currently an independent statistical consultant and co-founder of Arantu, a consultancy focused on mental health research and education. He holds a Master's degree in Clinical Psychology (PUC-SP, 2022), with specialization in Analytical Psychology (IJEP, 2020), and a degree in Electronic Engineering from Mackenzie University (1996). He also completed a post-graduate program in Applied Ethics. He worked for over 20 years in the telecommunications industry, including leadership roles at Nortel Networks and Ericsson, where he managed complex technical projects and large-scale network operations. In recent years, he transitioned into academic research and consulting, providing support in research methodology, statistical analysis, and scientific writing. He collaborates with institutions such as PUC-SP, USP, UNIFESP, UFABC, and FGV-SP. His current research interests include mental health, data analysis and methodological rigor in clinical studies. He combines quantitative expertise with a human-centered approach, aiming to support evidence-based practices in both academic and applied contexts.