Bibliometric data underpinning the citation-based metrics employed in this ranking were collected on January 12, 2026. A scientist’s position within the ranking is determined by their D-index (Discipline H-index), which specifically aggregates papers and citation metrics pertinent only to the examined discipline of Engineering and Technology, thus providing a focused and discipline-relevant measure of research impact.
Scope of Research and Qualification Criteria
The ranking methodology evaluated a total of 279,971 scientist profiles identified from diverse bibliometric sources spanning all academic disciplines. Within this broad landscape, 20 scientists from the field of Engineering and Technology were specifically examined to compile the final ranking.
To qualify for inclusion, a scientist’s D-index had to meet a minimum threshold of 30, ensuring recognition of significant scholarly contribution. Additionally, the majority of the researcher’s tier publications needed to be within the Engineering and Technology domain, asserting topical relevance. Awards and notable achievements within the same field were also taken into account as supplementary qualitative indicators.
The threshold for the D-index to consider top researchers is adjusted in increments of 10 relative to the estimated total number of scholars per discipline. This system guarantees that the top 1% of leading scholars are represented in the ranking. Furthermore, to maintain consistency and field specificity, the proximity between a scientist's general H-index and their D-index was required to be 30% or less.
Verification and Validation Practices
Recognizing that raw bibliometric data alone cannot fully capture the nuances of scholarly impact, the Research.com team conducted meticulous manual verification of all scientist profiles included in the ranking. This process involved cross-correlating publication records against a broad spectrum of reputable sources to ensure accuracy and reliability of the data.
While not influencing the position within the ranking itself, the number of publications in prominent journals and conference proceedings was considered an important secondary signal reflecting a scientist’s substantive contribution to the domain of Engineering and Technology.
Positions in the ranking were ultimately established using each researcher’s D-index as aggregated from OpenAlex and CrossRef, which are among the most comprehensive and reputable bibliometric databases available to the research community at this time. For a detailed explanation of the methodology employed, please visit our methodology page.
Research.com’s Mission
At Research.com, our mission is to motivate researchers, companies, and policymakers worldwide to actively examine the trajectories of leading experts in various disciplines. We aim to provide a transparent and authoritative platform through which the entire scientific community can identify and engage with the foremost specialists in specific areas of study, across countries, and within research institutions.
This ranking embodies our commitment to advancing scholarly excellence and fostering informed collaboration by making expert identification rigorous, credible, and accessible.
