Bibliometric data instrumental to the construction of citation-based metrics for this ranking were meticulously collected on January 12, 2026. The position of each scientist within the ranking is determined by the D-index (Discipline H-index), a refined bibliometric metric that exclusively considers publications and citations within the scientist’s specific discipline. This targeted approach ensures that the evaluation is relevant and precise to the field of Engineering and Technology.
Scope and Selection Criteria of the Ranking
The scope of this ranking is extensive and carefully curated. Initially, 279,971 scientist profiles were examined across diverse disciplines through various bibliometric sources to establish a broad foundational dataset. Within the focus discipline of Engineering and Technology, 136 scientists were identified for further evaluation.
To qualify for inclusion in the ranking, a scientist's D-index must be at least 30, and a majority of their tier publications must fall within the Engineering and Technology domain. Additionally, awards and notable achievements in this field are factored into the consideration process to provide a qualitative dimension to the otherwise quantitative metrics.
The D-index threshold is dynamically set in increments of 10, calibrated according to the estimated total number of scholars per discipline. This adaptive threshold mechanism ensures inclusion of the top 1% of leading scholars in each discipline, maintaining the ranking’s exclusivity and rigor. Furthermore, a proximity criterion is applied whereby the difference between a scientist's overall H-index and their D-index must be 30% or less, reinforcing disciplinary relevance in the evaluation.
Verification and Validation Process
The Research.com team acknowledges that raw bibliometric data alone do not serve as an absolute measure of scholarly impact or quality. Therefore, every shortlisted scientist profile underwent manual verification, including cross-correlation against publications and records in a wide array of trustworthy academic sources. This stringent validation process significantly enhances the reliability and credibility of the ranking.
While the total number of papers published in prominent journals and major conference proceedings does not directly influence the ranking position, it constitutes a valuable secondary indicator of a scientist’s active contribution to their research area.
The final ranking position is established based on each researcher’s D-index, derived from the consolidated data provided by OpenAlex and CrossRef. These platforms represent the most comprehensive and well-regarded bibliometric databases currently accessible to the global research community. For a detailed examination of the methodology employed, readers are encouraged to visit our methodology page.
Research.com’s Mission and Vision
The creation of this ranking aligns with Research.com’s overarching mission to inspire researchers, policymakers, academic institutions, and industry leaders worldwide to gain insights into the trajectories of leading experts. By shining a spotlight on who the foremost scientists are within specific areas of study, countries, and institutions, the ranking endeavors to foster greater awareness, collaboration, and informed decision-making across the global scientific ecosystem.
Through meticulous curation and transparent methodology, Research.com aspires to be an authoritative resource that supports the advancement and recognition of excellence in Engineering and Technology research.
