The bibliometric data used to devise the citation-based metrics underpinning this ranking were collected on January 12, 2026. A scientist’s position within the ranking is determined by their D-index (Discipline H-index), a refined variant of the traditional H-index that exclusively accounts for papers and citations within the examined discipline, ensuring a focused and discipline-specific evaluation of research impact.
Scope of the Research
This ranking is based on the examination of 279,971 scientist profiles identified from a broad array of bibliometric sources, spanning all academic disciplines. Specifically, in the domain of Engineering and Technology, 1,596 scientists were evaluated.
To qualify for inclusion in the ranking, scientists were required to have a D-index of at least 30. Furthermore, the majority of their tier publications needed to be within the Engineering and Technology discipline, reflecting a dedicated and significant contribution to this field. In addition to bibliometric criteria, consideration was also given to scientists’ awards and notable achievements pertinent to Engineering and Technology.
The D-index threshold for top researchers is adjusted incrementally by increments of 10, in accordance with the total estimated number of scholars in each discipline. This approach guarantees that the top 1% of leading scholars are comprehensively incorporated. Additionally, eligibility required that the proximity between a scientist’s general H-index and their D-index not exceed 30%, thus maintaining alignment between overall and discipline-specific impact measures.
Additional Verification Practices
Recognizing that raw bibliometric data alone cannot serve as an absolute tool to evaluate scholarly output, the researchers responsible for this ranking undertook meticulous manual verification of all scientist profiles. Each profile was cross-correlated against publications in a wide array of trustworthy and authoritative sources to ensure accuracy and authenticity.
While the number of papers published in prestigious journals and leading conference proceedings does not directly influence the ranking position, it remains a valuable secondary indicator of a scientist’s contributions to their specific research area. The primary metric, the D-index, is established using data gathered from OpenAlex and CrossRef—two of the most prominent and widely respected bibliometric databases available to the scholarly community.
We encourage readers to explore detailed insights about the methodology and verification process on our methodology page.
Research.com’s Mission Behind the Ranking
Research.com’s mission in creating this ranking is to motivate researchers, industry leaders, and policymakers globally to observe the trajectories of top experts in Engineering and Technology. By providing a transparent and credible platform, we aim to facilitate the scientific community’s awareness of who the leading experts are within specific areas of study, various countries, and research institutions.
This initiative reflects our commitment to fostering collaboration, recognition, and informed decision-making across the academic and research landscapes by showcasing excellence and leadership in science and technology.
