Post Doc Tony Walters is one of 6886 worldwide most highly cited researchers!

As described by Clarivate:

Each Highly Cited Researcher (HCR) selected has authored multiple Highly Cited Papers which rank in the top 1% by citations for their field(s) and publication year in the Web of Science™ over the past decade. However, citation activity is not the sole selection indicator. The list of HCRs, based on citation activity is then refined using qualitative analysis and expert judgment as we observe for evidence of community-wide recognition from an international and wide-ranging network of citing authors.

Of the world’s population of scientists and social scientists, Highly Cited Researchers are 1 in 1,000.