Bibliometric data utilized to devise the citation-based metrics for this ranking were collected on January 12, 2026. A scientist’s ranking position is determined by their D-index (Discipline H-index), which specifically measures impact within the discipline under examination. This approach ensures that only papers and citations relevant to Engineering and Technology are considered, providing a discipline-focused evaluation of scholarly contribution.
Scope of Research and Eligibility Criteria
In developing this ranking, a total of 279,971 scientist profiles identified from a wide array of bibliometric databases were examined across all scientific disciplines. Of these, 615 scientists specializing in Engineering and Technology were specifically evaluated.
To qualify for inclusion, a scientist's D-index had to meet a minimum threshold of 30, and the majority of their tier publications were required to be categorized within the Engineering and Technology domain. Additionally, consideration was given to each scientist’s awards and achievements pertinent to this field.
The D-index threshold is tailored according to the total number of scholars estimated for each discipline, set in increments of 10, to ensure proportional and equitable representation. Importantly, this methodology guarantees inclusion of the top 1% of leading scholars within each discipline. Furthermore, there is a careful validation step ensuring that the discrepancy between a scientist’s general H-index and their D-index remains within 30% or less, reinforcing consistency in impact assessment.
Verification and Validation Practices
Recognizing that raw bibliometric data alone cannot serve as an absolute measure of a researcher’s output or contribution, all scientist profiles were subjected to rigorous manual verification. Researchers compiling the ranking cross-correlated information against publications in a wide spectrum of trustworthy sources to ensure accuracy and authenticity.
Though not directly influencing the position of a researcher in the ranking, the quantity of papers published in prominent journals and reputable conference proceedings is regarded as a valuable secondary indicator of a scientist’s contribution to their specific field.
The ranking position is ultimately established utilizing each researcher’s D-index, derived from data aggregated through OpenAlex and CrossRef. These two sources stand as the foremost and most recognized bibliometric databases available to the scientific community.
For a detailed exposition of the methodology employed in compiling this ranking, readers are encouraged to visit our methodology page.
Research.com’s Mission and Agenda
Research.com’s mission in producing this ranking is to motivate researchers, corporations, and policymakers worldwide to gain insight into emerging trends by identifying where leading experts are directing their efforts. Our objective is to provide the global scientific community with an authoritative resource to recognize top-tier experts in specific disciplines, within diverse countries, or among individual research institutions.
By fostering transparency and accessibility of scholarly impact data, this ranking serves as an essential tool for informed decision-making, collaboration, and strategic investment in science and technology worldwide.
