Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (873,937 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection :5
Gita Ramjee
HIV Prevention
epidemiology
basic science
socio-behavioural science
Metrics
H-Index
i10 Index
Citation
54
160
14,326
* Rankings
Ranking Based On Selection :6
Kristin L Dunkle
gender
violence
sexual health
social epidemiology
Metrics
H-Index
i10 Index
Citation
52
93
15,047
* Rankings
Ranking Based On Selection :7
Arvin Bhana
mental health
HIV
children and adolescence
family resilience
substance use
Metrics
H-Index
i10 Index
Citation
52
123
10,318
* Rankings
Ranking Based On Selection :8
Andrew Gibbs
social psychology
interventions
masculinity
violence
gender
Metrics
H-Index
i10 Index
Citation
42
97
5,294
* Rankings
Ranking Based On Selection :9
Nwabisa Jama Shai
Gender
Femininities
Gender Based Violence
Interventions
Metrics
H-Index
i10 Index
Citation
40
62
9,341
* Rankings
Ranking Based On Selection :10
Angela Mathee
lead exposure
environmental health
Metrics
H-Index
i10 Index
Citation
38
111
4,316
* Rankings
Ranking Based On Selection :11
Yandisa Sikweyiya
gender
masculinities
research ethics
social aspects of HIV
gender violence
Metrics
H-Index
i10 Index
Citation
36
59
5,961
* Rankings
Ranking Based On Selection :17
Ashley Van Niekerk
burns
child safety
community safety
Metrics
H-Index
i10 Index
Citation
30
59
4,533
* Rankings
Ranking Based On Selection :18
Duduzile Ndwandwe
vaccinology
HIV
TB
vaccine implementation research
Metrics
H-Index
i10 Index
Citation
29
51
8,551
* Rankings
Ranking Based On Selection :20
Tara Carney
substance use
brief interventions
adolescents
gender
externalising behaviour
Metrics
H-Index
i10 Index
Citation
29
57
2,458
* Rankings
Ranking Based On Selection :21
Esnat D. Chirwa
Biostatistics
Gender-based violence research
Structural Equation Modelling
Metrics
H-Index
i10 Index
Citation
27
48
2,252
* Rankings
Ranking Based On Selection :25
Marlon E Cerf
Cardiovascular disease
Developmental programming
Diabetes
Global health
Nutrition
Metrics
H-Index
i10 Index
Citation
23
31
2,600
* Rankings
Ranking Based On Selection :26
Zoe Duby
HIV Prevention
Sexuality
Gender
Risk Behaviours
Health Rights and Access
Metrics
H-Index
i10 Index
Citation
22
36
1,420
* Rankings
Ranking Based On Selection :28
Shahnaaz Suffla
Decolonial psychology
Community psychology
African psychology
Liberation psychology
Community-based Participatory Research
Metrics
H-Index
i10 Index
Citation
22
40
2,334
* Rankings
Ranking Based On Selection :29
Sara Cooper
mental health
well-being
public health
social sciences
Metrics
H-Index
i10 Index
Citation
20
23
2,855
* Rankings
Ranking Based On Selection :31
Kim Jonas
Public Health
Contraceptive use
Teenage pregnancy prevention
SRHR
Metrics
H-Index
i10 Index
Citation
18
28
1,247
* Rankings
Ranking Based On Selection :32
Edward Nicol
Health Systems Research
Data quality
Public health informatics
HIV prevention and care
Programme monitoring and evaluation
Metrics
H-Index
i10 Index
Citation
17
21
1,341
* Rankings
Ranking Based On Selection :33
Catherine O. Egbe
Public Health
Tobacco Control
Mental Health
Commercial Determinants of Health
Psychology
Metrics
H-Index
i10 Index
Citation
17
32
1,476
* Rankings
Ranking Based On Selection :38
Cindy George
medical research
epidemiology
non-communicable diseases
chronic kidney disease
Metrics
H-Index
i10 Index
Citation
14
16
761
* Rankings
Ranking Based On Selection :42
Sebenzile (Sebe) Nkosi
Men and masculinities
substance use
violence
HIV
Metrics
H-Index
i10 Index
Citation
13
15
608
* Rankings
Ranking Based On Selection :44
Pinky Mahlangu
gender-based violence
HIV
mental health
adolescent girls & young women
intervention development
Metrics
H-Index
i10 Index
Citation
13
14
430
* Rankings
Ranking Based On Selection :46
Ameer Steven-Jorg Hohlfeld
public health
cochrane reviews
research methods
epidemiology
clinical trials
Metrics
H-Index
i10 Index
Citation
12
13
4,092
* Rankings
Ranking Based On Selection :47
Bianca Wernecke
Air pollution and health
climate change
heat and health
fuel use patterns and health in South Afr
Metrics
H-Index
i10 Index
Citation
12
13
807
* Rankings
Ranking Based On Selection :49
Eunice Turawa
Maternal and child health
Epidemiology and burden of disease
Health systems
Metrics
H-Index
i10 Index
Citation
11
15
574
* Rankings
Ranking Based On Selection :50
Naiema Taliep
Community engagement
Community-based participatory action research
violence prevention
intervention development
safety and p
Metrics
H-Index
i10 Index
Citation
11
13
345
* Rankings
Ranking Based On Selection :51
Oluwatoyin Awotiwon
Epidemiology
Public Health
Burden of Disease
Cause of death reporting
Clinical coding
Metrics
H-Index
i10 Index
Citation
10
10
445
* Rankings
Ranking Based On Selection :61
Warren Covelé Lucas
Exercise Science
Public Health
Epidemiology
Exercise Physiology
Sport and Recreation
Metrics
H-Index
i10 Index
Citation
6
6
164
* Rankings
Ranking Based On Selection :62
Awelani M. Mutshembele
Microbiology
Molecular Biology
Bioinformatics
Genomics
Infectious Diseases and Molecular Veterinary Parasitology
Metrics
H-Index
i10 Index
Citation
6
5
194
* Rankings
Ranking Based On Selection :63
Nobuhle Mchunu
Joint modeling
Survival analysis
Longitudinal data analysis
Clinical trials
Data Science
Metrics
H-Index
i10 Index
Citation
6
3
91
Stanley Carries
Health Economics
Mental Health
Wellbeing
Youth
HIV/AIDS
Metrics
H-Index
i10 Index
Citation
2
1
26
Rankings
Ranking Based On Selection: 1
Carl Lombard
Metrics
H-Index
i10 Index
Citation Counts
97
403
33,367
Rankings
Ranking Based On Selection: 2
Debbie Bradshaw
Metrics
H-Index
i10 Index
Citation Counts
76
224
25,138
Rankings
Ranking Based On Selection: 3
Catherine Mathews
Metrics
H-Index
i10 Index
Citation Counts
58
192
10,324
Rankings
Ranking Based On Selection: 4
Naeemah Abrahams
Metrics
H-Index
i10 Index
Citation Counts
55
96
15,815
Gender gender-based violence rape HIV
Rankings
Ranking Based On Selection: 5
Gita Ramjee
Metrics
H-Index
i10 Index
Citation Counts
54
160
14,326
HIV Prevention
epidemiology
basic science
socio-behavioural science
Rankings
Ranking Based On Selection: 6
Kristin L Dunkle
Metrics
H-Index
i10 Index
Citation Counts
52
93
15,047
gender
violence
sexual health
social epidemiology
Rankings
Ranking Based On Selection: 7
Arvin Bhana
Metrics
H-Index
i10 Index
Citation Counts
52
123
10,318
mental health
HIV
children and adolescence
family resilience
substance use
Rankings
Ranking Based On Selection: 8
Andrew Gibbs
Metrics
H-Index
i10 Index
Citation Counts
42
97
5,294
social psychology
interventions
masculinity
violence
gender
Rankings
Ranking Based On Selection: 9
Nwabisa Jama Shai
Metrics
H-Index
i10 Index
Citation Counts
40
62
9,341
Gender
Femininities
Gender Based Violence
Interventions
Rankings
Ranking Based On Selection: 10
Angela Mathee
Metrics
H-Index
i10 Index
Citation Counts
38
111
4,316
lead exposure
environmental health
Rankings
Ranking Based On Selection: 11
Yandisa Sikweyiya
Metrics
H-Index
i10 Index
Citation Counts
36
59
5,961
gender
masculinities
research ethics
social aspects of HIV
gender violence
Rankings
Ranking Based On Selection: 12
Ml Van Der Walt Swanepoel
Metrics
H-Index
i10 Index
Citation Counts
36
64
6,058
Salmonella
tuberculosis
campylobacter
Lawsonia
Rankings
Ranking Based On Selection: 13
Phiwayinkosi V. Dludla
Metrics
H-Index
i10 Index
Citation Counts
34
93
3,571
Rankings
Ranking Based On Selection: 14
Caradee Y. Wright
Metrics
H-Index
i10 Index
Citation Counts
33
102
5,186
Rankings
Ranking Based On Selection: 15
Tarylee Reddy
Metrics
H-Index
i10 Index
Citation Counts
30
64
2,592
Rankings
Ranking Based On Selection: 16
Tamara Kredo
Metrics
H-Index
i10 Index
Citation Counts
30
68
4,594
Rankings
Ranking Based On Selection: 17
Ashley Van Niekerk
Metrics
H-Index
i10 Index
Citation Counts
30
59
4,533
burns
child safety
community safety
Rankings
Ranking Based On Selection: 18
Duduzile Ndwandwe
Metrics
H-Index
i10 Index
Citation Counts
29
51
8,551
vaccinology
HIV
TB
vaccine implementation research
Rankings
Ranking Based On Selection: 19
Phetole Walter Mahasha
Metrics
H-Index
i10 Index
Citation Counts
29
34
22,686
Rankings
Ranking Based On Selection: 20
Tara Carney
Metrics
H-Index
i10 Index
Citation Counts
29
57
2,458
substance use
brief interventions
adolescents
gender
externalising behaviour
Rankings
Ranking Based On Selection: 21
Esnat D. Chirwa
Metrics
H-Index
i10 Index
Citation Counts
27
48
2,252
Biostatistics
Gender-based violence research
Structural Equation Modelling
Rankings
Ranking Based On Selection: 22
Marian Loveday
Metrics
H-Index
i10 Index
Citation Counts
26
44
2,316
Rankings
Ranking Based On Selection: 23
Karen Daniels
Metrics
H-Index
i10 Index
Citation Counts
25
41
5,117
Rankings
Ranking Based On Selection: 24
Evanson Z Sambala
Metrics
H-Index
i10 Index
Citation Counts
23
30
18,628
Rankings
Ranking Based On Selection: 25
Marlon E Cerf
Metrics
H-Index
i10 Index
Citation Counts
23
31
2,600
Cardiovascular disease
Developmental programming
Diabetes
Global health
Nutrition
Rankings
Ranking Based On Selection: 26
Zoe Duby
Metrics
H-Index
i10 Index
Citation Counts
22
36
1,420
HIV Prevention
Sexuality
Gender
Risk Behaviours
Health Rights and Access
Rankings
Ranking Based On Selection: 27
Natalie Leon
Metrics
H-Index
i10 Index
Citation Counts
22
38
2,028
Rankings
Ranking Based On Selection: 28
Shahnaaz Suffla
Metrics
H-Index
i10 Index
Citation Counts
22
40
2,334
Decolonial psychology
Community psychology
African psychology
Liberation psychology
Community-based Participatory Research
Rankings
Ranking Based On Selection: 29
Sara Cooper
Metrics
H-Index
i10 Index
Citation Counts
20
23
2,855
mental health
well-being
public health
social sciences
Rankings
Ranking Based On Selection: 30
Makandwe Nyirenda
Metrics
H-Index
i10 Index
Citation Counts
20
28
1,610
Rankings
Ranking Based On Selection: 31
Kim Jonas
Metrics
H-Index
i10 Index
Citation Counts
18
28
1,247
Public Health
Contraceptive use
Teenage pregnancy prevention
SRHR
Rankings
Ranking Based On Selection: 32
Edward Nicol
Metrics
H-Index
i10 Index
Citation Counts
17
21
1,341
Health Systems Research
Data quality
Public health informatics
HIV prevention and care
Programme monitoring and evaluation
Rankings
Ranking Based On Selection: 33
Catherine O. Egbe
Metrics
H-Index
i10 Index
Citation Counts
17
32
1,476
Public Health
Tobacco Control
Mental Health
Commercial Determinants of Health
Psychology
Rankings
Ranking Based On Selection: 34
Darshini Govindasamy
Metrics
H-Index
i10 Index
Citation Counts
17
21
3,186
Epidemiology
Health economics
HIV/TB
wellbeing
youth
Rankings
Ranking Based On Selection: 35
Wisdom Basera
Metrics
H-Index
i10 Index
Citation Counts
16
23
904
Rankings
Ranking Based On Selection: 36
Louise Renton
Metrics
H-Index
i10 Index
Citation Counts
15
19
1,327
Rankings
Ranking Based On Selection: 37
Mercilene Machisa
Metrics
H-Index
i10 Index
Citation Counts
14
18
1,078
Rankings
Ranking Based On Selection: 38
Cindy George
Metrics
H-Index
i10 Index
Citation Counts
14
16
761
medical research
epidemiology
non-communicable diseases
chronic kidney disease
Rankings
Ranking Based On Selection: 39
Carrie Brooke-Sumner
Metrics
H-Index
i10 Index
Citation Counts
14
15
2,160
Rankings
Ranking Based On Selection: 40
Nomonde Gwebushe
Metrics
H-Index
i10 Index
Citation Counts
14
14
1,479
Rankings
Ranking Based On Selection: 41
Wanga Zembe-Mkabile
Metrics
H-Index
i10 Index
Citation Counts
14
18
715
Social Policy
maternal and child health
public health
Rankings
Ranking Based On Selection: 42
Sebenzile (Sebe) Nkosi
Metrics
H-Index
i10 Index
Citation Counts
13
15
608
Men and masculinities
substance use
violence
HIV
Rankings
Ranking Based On Selection: 43
Leane Ramsoomar-Hariparsaad
Metrics
H-Index
i10 Index
Citation Counts
13
18
725
Public Health
Alcohol
gender based violence
health promotion
Rankings
Ranking Based On Selection: 44
Pinky Mahlangu
Metrics
H-Index
i10 Index
Citation Counts
13
14
430
gender-based violence
HIV
mental health
adolescent girls & young women
intervention development
Rankings
Ranking Based On Selection: 46
Ameer Steven-Jorg Hohlfeld
Metrics
H-Index
i10 Index
Citation Counts
12
13
4,092
public health
cochrane reviews
research methods
epidemiology
clinical trials
Rankings
Ranking Based On Selection: 47
Bianca Wernecke
Metrics
H-Index
i10 Index
Citation Counts
12
13
807
Air pollution and health
climate change
heat and health
fuel use patterns and health in South Afr
Rankings
Ranking Based On Selection: 48
Brodie Daniels
Metrics
H-Index
i10 Index
Citation Counts
12
13
951
Rankings
Ranking Based On Selection: 49
Eunice Turawa
Metrics
H-Index
i10 Index
Citation Counts
11
15
574
Maternal and child health
Epidemiology and burden of disease
Health systems
Rankings
Ranking Based On Selection: 50
Naiema Taliep
Metrics
H-Index
i10 Index
Citation Counts
11
13
345
Community engagement
Community-based participatory action research
violence prevention
intervention development
safety and p
Rankings
Ranking Based On Selection: 51
Oluwatoyin Awotiwon
Metrics
H-Index
i10 Index
Citation Counts
10
10
445
Epidemiology
Public Health
Burden of Disease
Cause of death reporting
Clinical coding
Rankings
Ranking Based On Selection: 52
Nomfundo T. Mahlangeni
Metrics
H-Index
i10 Index
Citation Counts
10
10
349
Rankings
Ranking Based On Selection: 53
Zamantimande Kunene
Metrics
H-Index
i10 Index
Citation Counts
10
10
227
Rankings
Ranking Based On Selection: 54
Anesh Sukhai
Metrics
H-Index
i10 Index
Citation Counts
10
11
437
Rankings
Ranking Based On Selection: 55
Busisiwe Shezi
Metrics
H-Index
i10 Index
Citation Counts
9
8
207
Rankings
Ranking Based On Selection: 56
Duduzile Faith Nsibande
Metrics
H-Index
i10 Index
Citation Counts
9
8
479
Rankings
Ranking Based On Selection: 57
Samukelisiwe Shabalala
Metrics
H-Index
i10 Index
Citation Counts
8
8
542
Rankings
Ranking Based On Selection: 58
Hlengiwe Moloi
Metrics
H-Index
i10 Index
Citation Counts
7
6
123
Rankings
Ranking Based On Selection: 59
Bradley Shaun Carpenter
Metrics
H-Index
i10 Index
Citation Counts
7
6
255
Rankings
Ranking Based On Selection: 60
Yoonus Abrahams
Metrics
H-Index
i10 Index
Citation Counts
6
6
434
Rankings
Ranking Based On Selection: 61
Warren Covelé Lucas
Metrics
H-Index
i10 Index
Citation Counts
6
6
164
Exercise Science
Public Health
Epidemiology
Exercise Physiology
Sport and Recreation
Rankings
Ranking Based On Selection: 62
Awelani M. Mutshembele
Metrics
H-Index
i10 Index
Citation Counts
6
5
194
Microbiology
Molecular Biology
Bioinformatics
Genomics
Infectious Diseases and Molecular Veterinary Parasitology
Rankings
Ranking Based On Selection: 63
Nobuhle Mchunu
Metrics
H-Index
i10 Index
Citation Counts
6
3
91
Joint modeling
Survival analysis
Longitudinal data analysis
Clinical trials
Data Science
Rankings
Ranking Based On Selection: 64
Shirley Malema
Metrics
H-Index
i10 Index
Citation Counts
5
5
233
Rankings
Ranking Based On Selection: 65
Tanya Haman
Metrics
H-Index
i10 Index
Citation Counts
5
3
115
Rankings
Ranking Based On Selection: 66
Jane Simmonds
Metrics
H-Index
i10 Index
Citation Counts
4
2
92
Rankings
Ranking Based On Selection: 67
Ntombifuthi "Ntombi" Blose
Metrics
H-Index
i10 Index
Citation Counts
3
2
51
Data Science
Epidemiology
Vaccinology
Evidence Based-Medicine
Biostatistics
Rankings
Ranking Based On Selection: 69
Stanley Carries
Metrics
H-Index
i10 Index
Citation Counts
2
1
26
Health Economics
Mental Health
Wellbeing
Youth
HIV/AIDS
Rankings
Ranking Based On Selection: 70
Nokwanda Sithole
Metrics
H-Index
i10 Index
Citation Counts
2
2
39
Health economics
mental health
adolescents
HIV
Rankings
Ranking Based On Selection: 71
Philile Makhunga
Metrics
H-Index
i10 Index
Citation Counts
1
1
18