California / Department of Public Health / Research Scientist IV (Epidemiology/Biostatistics)

Job-title file

Research Scientist IV (Epidemiology/Biostatistics)

Collect and analyze data to inform decisions, produce reports, and identify trends.

11 employees hold this title in Department of Public Health. Median total compensation for the role is $117,240, above the department median of $92,430.

Employees: 11
Total payroll: $1.1M
Role median: $117,240
Agency median: $92,430
Comparison: Above

What the records show

Role pay distribution

Pay distribution for this role

$17,616$141,199+

Hover a bar for its range; click to filter the list below.

How total compensation varies among the 11 people in this role. Even for one job title, pay differs with seniority, step, overtime, and tenure. Each bar is a pay range; the far-right bar collects the highest earners.

Compare departments

This role across California

Research Scientist IV (Epidemiology/Biostatistics) is held in 7 California departments. In Department of Public Health, the median of $117,240 ranks #6 of 7.

Highest-paying departments for this role

Food and Agriculture

$166,735 · 1

Health Care Access and Information

$140,073 · 1

Envirnmtl Health Hazrd Assess

$139,207 · 5

Pesticide Regulation

$138,302 · 1

Department of Health Care Services

$124,206 · 4

Water Resources Control Board

$75,049 · 2

Median total compensation for the Research Scientist IV (Epidemiology/Biostatistics) role in other Californiadepartments (highest first). Each bar links to that department’s page for this role.

Compare jurisdictions

Research Scientist beyond California

This role is reported in 6 jurisdictions. In California, the median of $104,459 ranks #2 of 6. See Research Scientist across all of California →

Highest-paying jurisdictions for this role

$109,532 · 158

$96,654 · 395

$80,039 · 10

$73,100 · 13

$60,000 · 7

Median total compensation for comparable Research Scientist roles in other jurisdictions. Titles are matched by normalized name across sources, not identical job classification, and pay is not cost-of-living adjusted. Each bar links to that jurisdiction’s page for the role.

Record list

Employees with this title

Page 1

David Crow

Research Scientist IV (Epidemiology/Biostatistics)/Department of Public Health

2025 total comp

$142,552

Base pay: $142,052
Overtime: $0
Other pay: $500
Benefits: $0
Total compensation: $142,552
Employment type: Full-Time
Union / bargaining unit: R10
Work county: Contra Costa
Middle name: B

Source-specific fields

Base Pay: $12,067
Cs/csu: Cs
Position Number: 5800355609003
Salary Total: $12,257
Total Pay: $142,552

David Crow is a Research Scientist IV (Epidemiology/Biostatistics) at Department of Public Health. They work full-time. 2025 total compensation came to $142,552. Union affiliation: R10.

Hector Manuel Sanchez Castellanos

Research Scientist IV (Epidemiology/Biostatistics)/Department of Public Health

2025 total comp

$135,785

Base pay: $135,535
Overtime: $0
Other pay: $250
Benefits: $0
Total compensation: $135,785
Employment type: Full-Time
Union / bargaining unit: R10
Work county: Contra Costa

Source-specific fields

Base Pay: $11,082
Cs/csu: Cs
Position Number: 5804275609001
Salary Total: $11,277
Total Pay: $135,785

Hector Manuel Sanchez Castellanos is a Research Scientist IV (Epidemiology/Biostatistics) at Department of Public Health. They work full-time. 2025 total compensation came to $135,785. They are represented by R10.

Cassandra Schember

Research Scientist IV (Epidemiology/Biostatistics)/Department of Public Health

2025 total comp

$133,201

Base pay: $132,851
Overtime: $0
Other pay: $350
Benefits: $0
Total compensation: $133,201
Employment type: Full-Time
Union / bargaining unit: R10
Work county: Contra Costa
Middle name: O

Source-specific fields

Base Pay: $11,082
Cs/csu: Cs
Position Number: 5804105609909
Salary Total: $11,277
Total Pay: $133,201

Cassandra Schember is a Research Scientist IV (Epidemiology/Biostatistics) at Department of Public Health. They work full-time. 2025 total compensation came to $133,201. Their bargaining unit is R10.

Neil Adhikari

Research Scientist IV (Epidemiology/Biostatistics)/Department of Public Health

2025 total comp

$128,070

Base pay: $127,620
Overtime: $0
Other pay: $450
Benefits: $0
Total compensation: $128,070
Employment type: Full-Time
Union / bargaining unit: R10
Work county: Sacramento
Middle name: D

Source-specific fields

Base Pay: $11,083
Cs/csu: Cs
Position Number: 5808115609001
Salary Total: $11,028
Total Pay: $128,070

Neil Adhikari works as a Research Scientist IV (Epidemiology/Biostatistics) for Department of Public Health. Their status is full-time. Neil earned $128,070 in 2025. They are represented by R10.

Ian Tang

Research Scientist IV (Epidemiology/Biostatistics)/Department of Public Health

2025 total comp

$118,544

Base pay: $118,019
Overtime: $0
Other pay: $525
Benefits: $0
Total compensation: $118,544
Employment type: Full-Time
Union / bargaining unit: R10
Work county: Contra Costa
Middle name: W

Source-specific fields

Base Pay: $10,052
Cs/csu: Cs
Position Number: 5803535609002
Salary Total: $10,252
Total Pay: $118,544

At Department of Public Health, Ian Tang serves as a Research Scientist IV (Epidemiology/Biostatistics). They work full-time. Their 2025 pay totaled $118,544. Union affiliation: R10.

Gilda Zarate-Gonzalez

Research Scientist IV (Epidemiology/Biostatistics)/Department of Public Health

2025 total comp

$117,240

Base pay: $116,611
Overtime: $0
Other pay: $629
Benefits: $0
Total compensation: $117,240
Employment type: Full-Time
Union / bargaining unit: R10
Work county: Sacramento
Middle name: Y

Source-specific fields

Base Pay: $10,051
Cs/csu: Cs
Position Number: 5800115609001
Salary Total: $10,001
Total Pay: $117,240

At Department of Public Health, Gilda Zarate-Gonzalez serves as a Research Scientist IV (Epidemiology/Biostatistics). They work full-time. Their 2025 pay totaled $117,240. Union affiliation: R10.

Maithili Ramachandran

Research Scientist IV (Epidemiology/Biostatistics)/Department of Public Health

2024 total comp

$114,406

Base pay: $113,806
Overtime: $0
Other pay: $600
Benefits: $0
Total compensation: $114,406
Employment type: Full-Time
Union / bargaining unit: R10
Work county: Contra Costa

Source-specific fields

Base Pay: $9,711
Cs/csu: Cs
Position Number: 5800355609004
Salary Total: $10,002
Total Pay: $114,406

Maithili Ramachandran holds the role of Research Scientist IV (Epidemiology/Biostatistics) at Department of Public Health. Their status is full-time. In 2024, their total compensation was $114,406. They are represented by R10.

Isobel Routledge

Research Scientist IV (Epidemiology/Biostatistics)/Department of Public Health

2023 total comp

$90,000

Base pay: $90,000
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $90,000
Employment type: Full-Time
Union / bargaining unit: R10
Work county: Sacramento

Source-specific fields

Base Pay: $10,000
Cs/csu: Cs
Position Number: 5814105609909
Salary Total: $10,000
Total Pay: $90,000

Isobel Routledge holds the role of Research Scientist IV (Epidemiology/Biostatistics) at Department of Public Health. Their status is full-time. In 2023, their total compensation was $90,000. Union affiliation: R10.

Marisa Donnelly

Research Scientist IV (Epidemiology/Biostatistics)/Department of Public Health

2023 total comp

$59,629

Base pay: $56,121
Overtime: $0
Other pay: $3,508
Benefits: $0
Total compensation: $59,629
Employment type: Full-Time
Union / bargaining unit: R10
Work county: Contra Costa
Middle name: A

Source-specific fields

Base Pay: $9,667
Cs/csu: Cs
Position Number: 5814105609909
Salary Total: $9,957
Total Pay: $59,629

Marisa Donnelly holds the role of Research Scientist IV (Epidemiology/Biostatistics) at Department of Public Health. Their status is full-time. In 2023, their total compensation was $59,629. Union affiliation: R10.

Christopher Hoover

Research Scientist IV (Epidemiology/Biostatistics)/Department of Public Health

2023 total comp

$40,915

Base pay: $37,768
Overtime: $0
Other pay: $3,147
Benefits: $0
Total compensation: $40,915
Employment type: Full-Time
Union / bargaining unit: R10
Work county: Sacramento
Middle name: M

Source-specific fields

Base Pay: $9,167
Cs/csu: Cs
Position Number: 5814105609909
Salary Total: $9,442
Total Pay: $40,915

At Department of Public Health, Christopher Hoover serves as a Research Scientist IV (Epidemiology/Biostatistics). They work full-time. Their 2023 pay totaled $40,915. Their bargaining unit is R10.

Sophie Zhu

Research Scientist IV (Epidemiology/Biostatistics)/Department of Public Health

2025 total comp

$17,616

Base pay: $17,616
Overtime: $0
Other pay: $0
Benefits: $0
Total compensation: $17,616
Employment type: Full-Time
Union / bargaining unit: R10
Work county: Contra Costa
Middle name: M

Source-specific fields

Base Pay: $9,249
Cs/csu: Cs
Position Number: 5804275609909
Salary Total: $9,453
Total Pay: $17,616

Sophie Zhu holds the role of Research Scientist IV (Epidemiology/Biostatistics) at Department of Public Health. Their status is full-time. In 2025, their total compensation was $17,616. They are represented by R10.