For this edition, all citation-based metrics and related data were rigorously collected on 2026-01-12 to ensure currency and consistency across the evaluated profiles. A scientist’s position within the ranking is determined exclusively by their D-index (Discipline H-index), a refined metric that accounts only for publications and citation data pertinent to the specific discipline under investigation—in this case, Engineering and Technology.
Scope of Research and Eligibility Criteria
The ranking process examined a total of 279,971 scientist profiles sourced from a diverse array of bibliometric databases covering all academic disciplines. Within the scope of Engineering and Technology specifically, 7,000 scientists were assessed for qualification.
To qualify for inclusion in the ranking, researchers were required to meet a minimum D-index threshold of 30. Additionally, a majority of their tier publications needed to be centered in Engineering and Technology to ensure disciplinary relevance. Consideration was also given to scientists’ awards and notable achievements within the field to reflect recognized scholarly impact.
The D-index threshold for identifying top researchers is dynamically calibrated in increments of 10 relative to the estimated population size of scholars in each discipline. This approach ensures that the top 1% of leading experts are consistently captured, representing the highest echelon of scientific contribution. Furthermore, eligibility necessitates that the proximity between a scientist’s general H-index and their D-index does not exceed 30%, maintaining coherence between overall and discipline-specific impact.
Verification and Validation Practices
Recognizing that raw bibliometric data cannot be treated as an absolute measure of scholarly output, the Research.com team undertook meticulous manual verification of all candidate profiles. These profiles were cross-correlated against publications indexed in numerous trustworthy sources to validate authorship and disciplinary alignment.
It should be noted that while the number of papers published in prestigious journals and conference proceedings does not directly affect a researcher’s ranking position, it serves as a valuable secondary signal indicative of their contributions to the field.
The final position in the ranking is firmly anchored in each researcher’s D-index, calculated from consolidated data provided by OpenAlex and CrossRef—two of the most authoritative and accessible bibliometric databases available to the scientific community.
For a comprehensive overview of the methodology, readers are encouraged to consult our methodology page.
Research.com’s Mission and Vision
At Research.com, our mission in compiling this ranking is to inspire researchers, corporate stakeholders, and policymakers globally to engage with the trajectories of leading experts in Engineering and Technology. By providing a transparent and rigorous means of identifying top scientists within specific disciplines, countries, and institutions, we aim to foster greater connectivity and awareness across the global scientific community.
We believe that by illuminating the landscape of scientific leadership, the ranking facilitates informed decision-making and collaboration, ultimately advancing research excellence and innovation worldwide.
