Ricardo João Santos Almeida holds Bachelor's (2017–2020, GPA 15/20; awarded IPL Industry Scholarship 2017 upon entry) and Master's degrees (2020–2022, GPA 17/20) in Automotive Engineering from ESTG-IPLeiria. His Master's thesis investigated low-carbon fuel utilization in heavy-duty fleet engines, including real-world fleet monitoring, which strengthened his expertise in energy efficiency, renewable fuels, and environmental policy analysis. He is currently in the second year of the PhD program in Sustainable Energy Systems at FCTUC (started September 2024). Since September 2021, he has served as Invited Assistant Professor in the Department of Mechanical Engineering at IPL, teaching Automotive Technology courses, and as a researcher at ADAI, where his work focuses on biofuel applications in heavy-duty fleets and the experimental validation of emerging solutions in light-duty vehicles. His peer-reviewed output includes a first-author Q1 review article, Decarbonization of EU Road Freight Transport in the Short and Medium Term Through Renewable Liquid Fuels—A Review (Energies, DOI: 10.3390/en19051382, 2026). He is also co-author of two published Springer book chapters (2025): Effects of Advanced Truck Fleet Monitoring on Engine Efficiency, Reliability and Sustainability (DOI: 10.1007/978-3-658-47966-4_14) and Study on the Effects of Using Different Blends of Biodiesel and HVO with Conventional Diesel in Heavy-Duty Vehicles (DOI: 10.1007/978-3-031-82407-4_6). In addition, two further Springer book chapters are forthcoming from HELIX 24 presentations: Analysis of Environmental Impacts from Heavy-Duty Engine Adjustments for HVO/Biodiesel Operation and CO2 Emissions Assessment Systems Implementation in Heavy-Duty Fleets. As a co-author, he contributed to papers presented at three international conferences in 2024: the 11th International Engine Congress (Baden-Baden, Germany), LUBMAT-IBERTRIB 2024 (San Sebastián, Spain), and HELIX 24 (Leiria, Portugal). He also co-authored five ADAI industry technical reports (2023–2025), including Low-Carbon Fuels in Portugal – 2030 Perspectives (PCBC Platform), the BD-HVO heavy/light-duty chassis dynamometer testing series, and the Bioálcool 2.0 compatibility studies (15,000 km real-road testing plus WLTP laboratory validation). In 2024/2025, he co-supervised undergraduate projects on low-carbon fuel applications in heavy- and light-duty vehicles. His technical expertise includes chassis dynamometer performance and emissions testing, OBD-based fleet monitoring, lubricating oil condition analysis, exhaust gas characterization (CO, CO2, NOx, PM), multicriteria biofuel blend optimization, and national fleet decarbonization scenario modelling. All this work has been conducted within LAETA (FCT UIDB/50022/2020), Portugal’s Associated Laboratory for Energy, Transports and Aeronautics.