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" (873,864 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 :1
Elfed Lewis
Optical Fibre Sensors
Optical Sensors and Instrumentation
Metrics
H-Index
i10 Index
Citation
44
208
8,150
* Rankings
Ranking Based On Selection :2
Conor Ryan
Automatic Programming
Evolutionary Computation
Grammatical Evolution
Flash Memory
Genetic Programming
Metrics
H-Index
i10 Index
Citation
39
123
7,970
* Rankings
Ranking Based On Selection :3
Colin Fitzpatrick
digital remanufacturing
circular economy
WEEE
E-Waste
electricity demand management
Metrics
H-Index
i10 Index
Citation
32
66
3,612
Daniel Toal
Robotics
electrical engineering
marine and airborne systems
marine renewable energy.
Metrics
H-Index
i10 Index
Citation
27
76
3,244
John Nelson
Electronic Engineering
Computer Engineering
eHealth
mHealth
Metrics
H-Index
i10 Index
Citation
26
47
3,464
Shalini Singh
Semiconductor nanocrystals
Colloidal Nanocrystals
Energy storage
Energy conversion
Metrics
H-Index
i10 Index
Citation
22
34
1,424
Michael Connelly
Optical communications
photonic devices
interferometry
sensors
Metrics
H-Index
i10 Index
Citation
22
48
2,809
Abdulhussain E Mahdi
Speech & Natural Language Processing
Information Retrieval
Text Mining/Text Analytics
Information Management & Knowledge Orga
Metrics
H-Index
i10 Index
Citation
19
29
1,120
* Rankings
Ranking Based On Selection :12
Jacqueline Walker
Telecommunications
Metastability
Biomedical Signal Processing
Audio signal processing
Speech processing
Metrics
H-Index
i10 Index
Citation
13
13
578
* Rankings
Ranking Based On Selection :14
Reiner Dojen
Cyber Security
Security Protocol Design and Verification
Automated Reasoning
Metrics
H-Index
i10 Index
Citation
12
16
467
Yvonne Ryan-Fogarty
material flow analysis
waste management
education for sustainable development
green healthcare
WEEE
Metrics
H-Index
i10 Index
Citation
9
9
375
Rankings
Ranking Based On Selection: 1
Elfed Lewis
Metrics
H-Index
i10 Index
Citation Counts
44
208
8,150
Rankings
Ranking Based On Selection: 2
Conor Ryan
Metrics
H-Index
i10 Index
Citation Counts
39
123
7,970
Automatic Programming
Evolutionary Computation
Grammatical Evolution
Flash Memory
Genetic Programming
Rankings
Ranking Based On Selection: 3
Colin Fitzpatrick
Metrics
H-Index
i10 Index
Citation Counts
32
66
3,612
digital remanufacturing
circular economy
WEEE
E-Waste
electricity demand management
Rankings
Ranking Based On Selection: 4
Daniel Toal
Metrics
H-Index
i10 Index
Citation Counts
27
76
3,244
Robotics
electrical engineering
marine and airborne systems
marine renewable energy.
Rankings
Ranking Based On Selection: 5
John Nelson
Metrics
H-Index
i10 Index
Citation Counts
26
47
3,464
Rankings
Ranking Based On Selection: 6
M. O'Droma
Metrics
H-Index
i10 Index
Citation Counts
24
77
3,132
Rankings
Ranking Based On Selection: 7
Shalini Singh
Metrics
H-Index
i10 Index
Citation Counts
22
34
1,424
Semiconductor nanocrystals
Colloidal Nanocrystals
Energy storage
Energy conversion
Rankings
Ranking Based On Selection: 8
Michael Connelly
Metrics
H-Index
i10 Index
Citation Counts
22
48
2,809
Optical communications
photonic devices
interferometry
sensors
Rankings
Ranking Based On Selection: 9
Abdulhussain E Mahdi
Metrics
H-Index
i10 Index
Citation Counts
19
29
1,120
Speech & Natural Language Processing
Information Retrieval
Text Mining/Text Analytics
Information Management & Knowledge Orga
Rankings
Ranking Based On Selection: 10
Ian Grout
Metrics
H-Index
i10 Index
Citation Counts
14
25
1,222
Rankings
Ranking Based On Selection: 11
Karl Rinne
Metrics
H-Index
i10 Index
Citation Counts
14
25
1,137
Rankings
Ranking Based On Selection: 12
Jacqueline Walker
Metrics
H-Index
i10 Index
Citation Counts
13
13
578
Telecommunications
Metastability
Biomedical Signal Processing
Audio signal processing
Speech processing
Rankings
Ranking Based On Selection: 13
Claudia Coughlan
Metrics
H-Index
i10 Index
Citation Counts
12
12
1,337
Rankings
Ranking Based On Selection: 14
Reiner Dojen
Metrics
H-Index
i10 Index
Citation Counts
12
16
467
Cyber Security
Security Protocol Design and Verification
Automated Reasoning
Rankings
Ranking Based On Selection: 15
Yvonne Ryan-Fogarty
Metrics
H-Index
i10 Index
Citation Counts
9
9
375
material flow analysis
waste management
education for sustainable development
green healthcare
WEEE