Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 1.795 Scientists Citation Rankings (Sort by last 6 years Citation Index) - 2025
Discover the world’s highly cited researchers through the AD Scientific Index 2025 Citation Rankings.
These rankings evaluate scientists based on their total and recent citation counts, capturing the breadth and real-time currency of academic recognition. Citation data reveals how widely a scholar’s work is referenced, applied, and extended across diverse disciplines. The rankings are routinely updated to reflect ongoing citation growth, while eliminating distortions from excessive co-authorship and institutional inflation. Premium tools provide access to detailed citation dynamics, unethical citation behavior detection, and field-normalized benchmarking.
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 1
Global Health
Evidence synthesis
Infectious Disease Epidemiology
Vaccinology
HI
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
76,334
68,343
0.895
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* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 2
invasion ecology
invasion biology
invasion science
conservation biology
biological invasion
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
101,857
40,875
0.401
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 3
Epidemiology
Public Health
Infectious Diseases
EHealt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,960
36,214
0.906
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 4
Public Health: infectious disease epidemiology
evidence synthesis
vaccine implementation research
antimicrobial resistanc
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,666
29,418
0.992
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 5
Ecology
conservation Biology
Earth system science
Climate chang
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
51,907
22,181
0.427
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 6
Compulsivity
impulsivity
behavioural addiction
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,868
17,878
0.691
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 7
Fluid Mechanics
Thermal Science
Applied Mathematics
Modelling and Computations
BioMathematic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
30,102
17,461
0.580
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 8
Neonatal sepsis
Bloodstream infection
Antimicrobial resistance & stewardship
Healthcare-associated infection
Infection prev
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,015
16,133
0.948
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 9
Medical Virology
HIV
Virological Diagnosis
Emerging viral disease
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,737
15,630
0.607
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* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 10
Maternal and child health
life course development
child and adolescent development
global mental health
global healt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
27,525
15,578
0.566
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 11
Postharvest Technology
Food Science and Technology
Biosystems Engineering
Horticultural Science
Pomegranat
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,518
14,110
0.688
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 12
medicin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,426
13,847
0.960
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 13
Tuberculosi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,688
13,376
0.375
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 14
X-ray tomography
Additive Manufacturing
Biomimicr
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,383
12,745
0.886
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 15
Proteomics
Bioinformatics
Mass Spectrometr
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,111
12,467
0.428
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 16
Skeletal Muscle Physiology
Biology and Biotechnolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,568
11,809
0.603
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 17
Ecology
Invasion Science
Biological Invasion
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,735
11,662
0.562
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 18
Insect conservation
invertebrate conservation
conservation biology
landscape ecolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,911
11,331
0.421
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 19
erythrocytes
fibrinogen
platelets
coagulation
long covi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,447
10,951
0.628
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 20
Tuberculosis
Immunology
Biomarker
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,262
10,788
0.485
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 21
Disability studies
public mental health
cultural aspects of health car
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,661
10,533
0.465
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 22
Swarm Intelligence
Evolutionary Computation
Neural Networks
Optimization
Data Analytic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
33,087
10,122
0.306
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 23
mathematical ecology
ecological networks
biodiversity informatics
evolutionary dynamic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,562
9,690
0.623
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 24
Tuberculosis
medicine
microbiolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,312
9,573
0.496
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 25
Applied ecology
fire ecology
invasion ecology
ecosystem managemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,892
9,066
0.350
* Last 6 Years Citation Counts Rankings
Rankings
1,734
5
1
Ranking Based On Selection: 1
Ola Adetokunboh Md
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
76,334
68,343
0.895
Global Health
Evidence synthesis
Infectious Disease Epidemiology
Vaccinology
HI
* Last 6 Years Citation Counts Rankings
Rankings
4,032
17
2
Ranking Based On Selection: 2
David M. Richardson
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
101,857
40,875
0.401
invasion ecology
invasion biology
invasion science
conservation biology
biological invasion
* Last 6 Years Citation Counts Rankings
Rankings
4,879
22
3
Ranking Based On Selection: 3
Peter Nyasulumed Mace
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,960
36,214
0.906
Epidemiology
Public Health
Infectious Diseases
EHealt
* Last 6 Years Citation Counts Rankings
Rankings
6,758
28
4
Ranking Based On Selection: 4
Chinwe Iwu
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,666
29,418
0.992
Public Health: infectious disease epidemiology
evidence synthesis
vaccine implementation research
antimicrobial resistanc
* Last 6 Years Citation Counts Rankings
Rankings
10,596
46
5
Ranking Based On Selection: 5
Guy Midgley
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
51,907
22,181
0.427
Ecology
conservation Biology
Earth system science
Climate chang
* Last 6 Years Citation Counts Rankings
Rankings
14,645
62
6
Ranking Based On Selection: 6
Christine Lochner
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,868
17,878
0.691
Compulsivity
impulsivity
behavioural addiction
* Last 6 Years Citation Counts Rankings
Rankings
15,173
65
7
Ranking Based On Selection: 7
OD Makinde
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
30,102
17,461
0.580
Fluid Mechanics
Thermal Science
Applied Mathematics
Modelling and Computations
BioMathematic
* Last 6 Years Citation Counts Rankings
Rankings
17,084
70
8
Ranking Based On Selection: 8
Angela Dramowski
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,015
16,133
0.948
Neonatal sepsis
Bloodstream infection
Antimicrobial resistance & stewardship
Healthcare-associated infection
Infection prev
* Last 6 Years Citation Counts Rankings
Rankings
17,889
74
9
Ranking Based On Selection: 9
Wolfgang Preiser
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,737
15,630
0.607
Medical Virology
HIV
Virological Diagnosis
Emerging viral disease
* Last 6 Years Citation Counts Rankings
Rankings
17,982
75
10
Ranking Based On Selection: 10
Mark Tomlinson
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
27,525
15,578
0.566
Maternal and child health
life course development
child and adolescent development
global mental health
global healt
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* Last 6 Years Citation Counts Rankings
Rankings
20,899
81
11
Ranking Based On Selection: 11
Umezuruike Linus Opara
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,518
14,110
0.688
Postharvest Technology
Food Science and Technology
Biosystems Engineering
Horticultural Science
Pomegranat
* Last 6 Years Citation Counts Rankings
Rankings
21,507
87
12
Ranking Based On Selection: 12
Adrie Bekker
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,426
13,847
0.960
* Last 6 Years Citation Counts Rankings
Rankings
22,682
93
13
Ranking Based On Selection: 13
Robin M Warren
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,688
13,376
0.375
* Last 6 Years Citation Counts Rankings
Rankings
24,424
99
14
Ranking Based On Selection: 14
Anton Du Plessis
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,383
12,745
0.886
X-ray tomography
Additive Manufacturing
Biomimicr
* Last 6 Years Citation Counts Rankings
Rankings
25,219
103
15
Ranking Based On Selection: 15
David L. Tabb
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
29,111
12,467
0.428
Proteomics
Bioinformatics
Mass Spectrometr
* Last 6 Years Citation Counts Rankings
Rankings
27,415
113
16
Ranking Based On Selection: 16
Kathryn Myburgh
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,568
11,809
0.603
Skeletal Muscle Physiology
Biology and Biotechnolog
* Last 6 Years Citation Counts Rankings
Rankings
27,925
115
17
Ranking Based On Selection: 17
John Wilson
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,735
11,662
0.562
Ecology
Invasion Science
Biological Invasion
* Last 6 Years Citation Counts Rankings
Rankings
29,157
119
18
Ranking Based On Selection: 18
Michael J. Samways
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,911
11,331
0.421
Insect conservation
invertebrate conservation
conservation biology
landscape ecolog
* Last 6 Years Citation Counts Rankings
Rankings
30,657
125
19
Ranking Based On Selection: 19
Etheresia Pretorius
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,447
10,951
0.628
erythrocytes
fibrinogen
platelets
coagulation
long covi
* Last 6 Years Citation Counts Rankings
Rankings
31,324
128
20
Ranking Based On Selection: 20
Gerhard Walzl
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,262
10,788
0.485
Tuberculosis
Immunology
Biomarker
* Last 6 Years Citation Counts Rankings
Rankings
32,436
132
21
Ranking Based On Selection: 21
Leslie Swartz
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,661
10,533
0.465
Disability studies
public mental health
cultural aspects of health car
* Last 6 Years Citation Counts Rankings
Rankings
34,479
142
22
Ranking Based On Selection: 22
Andries Engelbrecht
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
33,087
10,122
0.306
Swarm Intelligence
Evolutionary Computation
Neural Networks
Optimization
Data Analytic
* Last 6 Years Citation Counts Rankings
Rankings
36,724
152
23
Ranking Based On Selection: 23
Cang Hui
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,562
9,690
0.623
mathematical ecology
ecological networks
biodiversity informatics
evolutionary dynamic
* Last 6 Years Citation Counts Rankings
Rankings
37,393
154
24
Ranking Based On Selection: 24
Andreas Henri Diacon
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,312
9,573
0.496
Tuberculosis
medicine
microbiolog
* Last 6 Years Citation Counts Rankings
Rankings
40,482
168
25
Ranking Based On Selection: 25
Brian W. Van Wilgen
Stellenbosch University
Stellenbosch, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,892
9,066
0.350
Applied ecology
fire ecology
invasion ecology
ecosystem managemen