Bibliometric data used to devise the citation-based metrics for this ranking were collected on January 12, 2026. The position of each scientist within the ranking is determined by their D-index (Discipline H-index), a specialized metric that considers only those publications and citation counts that fall strictly within the examined discipline of Engineering and Technology.
Scope of Research and Eligibility Criteria
Our evaluation encompassed a total of 279,971 scientist profiles, identified from a diverse range of bibliometric sources spanning all disciplines. Of these, 192 scholars specifically classified under Engineering and Technology were examined in detail. To qualify for inclusion in the ranking, a scientist’s D-index needed to be at least 30, ensuring a consistent standard of scholarly impact within the field.
In addition to meeting the D-index threshold, a majority of the scientist’s tier publications were required to be within the domain of Engineering and Technology. Recognizing the multifaceted nature of scholarly contributions, scientists' awards and achievements relevant to the field were also factored into the assessment.
The threshold D-index is set to increase in increments of 10 according to the estimated population size within each discipline, ensuring a stringent and scalable inclusion criterion. This approach guarantees that the ranking incorporates the top 1% of leading scholars in Engineering and Technology. Furthermore, to maintain coherence between general and discipline-specific impact, scientists were considered only if the proximity between their overall H-index and D-index did not exceed 30%.
Verification Practices and Methodological Transparency
At Research.com, we understand that bibliometric raw data alone cannot serve as an absolute measure of a scholar’s output or impact. For this reason, all scientist profiles included in the ranking underwent meticulous manual verification and cross-correlation against publications sourced from a broad range of credible and trustworthy repositories.
While not a direct factor in determining a researcher’s rank within our list, the number of papers published in prestigious journals and conference proceedings was also reviewed as a secondary indicator of scientific contribution and community engagement within Engineering and Technology.
The ranking’s position assignments are underpinned by each researcher's D-index as derived from data curated primarily through OpenAlex and CrossRef—two of the most prominent bibliometric databases widely recognized and utilized by the academic community. For a detailed exposition of the methodology applied, we encourage readers to visit our methodology page.
Research.com’s Mission and Vision
Research.com is committed to motivating researchers, academic institutions, companies, and policy makers worldwide to gain a clear understanding of where leading experts in the scientific community are focusing their efforts. By providing a transparent, rigorously constructed, and discipline-specific ranking of top scientists, we aim to facilitate broader recognition and foster collaboration opportunities.
Our mission is to offer an accessible and credible platform that highlights who the foremost experts are in specific scientific domains—across countries and institutions—thereby contributing to the advancement of research excellence globally.
