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Research Services companies headquartered in Maryland

Tamtam tracks 38 Research Services companies headquartered in Maryland. This list ranks all of them by number of employees on LinkedIn, led by National Institute of Standards and Technology (NIST), Westat and Howard Hughes Medical Institute (HHMI). Their median headcount is 473. Half of them were founded in 1974 or later. The most common headquarters are Bethesda (14), Rockville (4) and Baltimore (3).

🇺🇸 Maryland38 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
National Institute of Standards and Technology (NIST)nist.gov

An innovative federal agency advancing measurement science, standards, and technology to promote US innovation and industrial competitiveness

Research Services 🇺🇸 Gaithersburg 4,946 1901
2
Westatwestat.com

Westat provides professional services to improve outcomes in health, education, social policy, and transportation through research, data collection, clinical trials, evaluation, and communication

Research Services 🇺🇸 Bethesda 3,419 1963
3
Howard Hughes Medical Institute (HHMI)hhmi.org

Funding scientists and innovative research to advance human health, biology understanding, science education, and public engagement nationwide.

Research Services 🇺🇸 Chevy Chase 2,304 1953
4
University of Maryland School of Medicinemedschool.umaryland.edu

Leading biomedical research institution with top-tier faculty and extensive global reach, dedicated to advancing innovative research in virology, genomics, and global health

Research Services 🇺🇸 2,179 1807
5
The Henry M. Jackson Foundation for the Advancement of Military Medicinehjf.org

A nonprofit organization supporting military medical research, providing program management services to accelerate progress and advance Military Medicine

Research Services 🇺🇸 Bethesda 2,036 1983
6
Advarraadvarra.com

Advarra enhances clinical research by providing IRB and IBC review solutions, innovative technologies, and industry connections to optimize trial participant safety and research performance

Research Services 🇺🇸 Columbia 1,839 1983
7
NIH Innovatesnih.gov

A federal agency focused on researching mental disorders, part of NIH Conducts basic and clinical research to prevent, treat, and cure mental illnesses

Research Services 🇺🇸 Bethesda 1,542 1949
8
Emmes Grouptheemmesgroup.com

A company dedicated to advancing public health and biopharmaceutical innovation by combining human intelligence with artificial intelligence in clinical research

Research Services 🇺🇸 Rockville 1,411 2024
9
Emmestheemmesgroup.com

A global Contract Research Organization (CRO) with expertise in clinical research across various therapeutic areas, supporting public health and biopharmaceutical innovation

Research Services 🇺🇸 Rockville 1,188 n/a
10
Navitas Life Sciencesnavitaslifesciences.com

Global clinical research organization providing technology-driven CRO services, data science, regulatory support, and industry-focused consulting to biopharmaceutical clients worldwide

Research Services 🇺🇸 Gaithersburg 1,014 n/a
11
USAMRIID — U.S. Army Medical Research Institute of Infectious Diseaseshealth.mil

Leading research institute developing medical solutions to protect military and civilian populations from biological threats through vaccines, drugs, diagnostics, and collaborations with government agencies and industry partners

Research Services 🇺🇸 Frederick 968 1969
12
Space Telescope Science Institutestsci.edu

A leading space institute in Maryland, operating advanced space telescopes, curating data archives, conducting scientific research, and promoting diversity and inclusivity

Research Services 🇺🇸 Baltimore 763 1982
13
Walter Reed Army Institute of Researchwrair.health.mil

The company conducts research to develop vaccines, drugs, and solutions to protect military personnel from infectious diseases and enhance their resilience and readiness

Research Services 🇺🇸 Silver Spring 678 1893
14
National Institutes of Health (NIH): Intramural Research Program (IRP)irp.nih.gov

Leading biomedical research institution within the National Institutes of Health, conducting innovative basic, translational, and clinical research to advance medical discoveries and treatments

Research Services 🇺🇸 Bethesda 670 n/a
15
HJF Medical Research Internationalhjfmri.org

A nonprofit supporting international medical research and HIV prevention programs, focusing on vaccine development, clinical research, infectious disease surveillance, and global health initiatives

Research Services 🇺🇸 Bethesda 630 2001
16
Leidos Biomedical Research, Inc.

A research company in Frederick, Maryland, focusing on biomedical research and located at 1050 Boyles St

Research Services 🇺🇸 Frederick 589 2000
17
NIH Clinical Center (CC)cc.nih.gov

Leading research hospital conducting clinical trials to develop treatments, therapies, and interventions for improved healthcare, receiving recognition for its public service efforts

Research Services 🇺🇸 Bethesda 539 1953
18
The National Institute on Drug Abuse (NIDA)nida.nih.gov

Advancing science on drug use and addiction to improve individual and public health through research and knowledge application

Research Services 🇺🇸 North Bethesda 489 1974
19
National Institute of Neurological Disorders and Stroke (NINDS)ninds.nih.gov

The company provides medical advice and information on government transparency, while emphasizing user privacy and commenting guidelines on LinkedIn

Research Services 🇺🇸 Bethesda 473 1950
20
National Institute on Aging (NIA)nia.nih.gov

Government agency leading research on aging, Alzheimer's disease, and related dementias Engages on Twitter, Facebook, and YouTube for updates

Research Services 🇺🇸 Bethesda 425 1974
21
Social & Scientific Systemss-3.com

A health research company based in Maryland, providing technical and program management services to improve global public health outcomes

Research Services 🇺🇸 Silver Spring 393 1978
22
National Human Genome Research Institute (NHGRI)genome.gov

NHGRI drives genomics research at NIH, conducting and funding world-class research, training experts, and collaborating to accelerate scientific and medical breakthroughs

Research Services 🇺🇸 Bethesda 382 1989
23
PPDâ„¢ Evideraâ„¢ Solutionsppd.com

Evidera offers evidence-based solutions for demonstrating the real-world effectiveness, safety, and value of biopharmaceutical products from early development to loss of exclusivity

Research Services 🇺🇸 Bethesda 373 2013
24
U.S. Army DEVCOM C5ISR Centerc5isrcenter.devcom.army.mil

A research center under US Army Futures Command focused on developing advanced technologies for information dominance and tactical superiority

Research Services 🇺🇸 Apg 347 n/a
25
National Center for Advancing Translational Sciences (NCATS)ncats.nih.gov

Conducts and supports research to advance the science of translating discoveries into treatments, overcoming bottlenecks to get more treatments to patients faster.

Research Services 🇺🇸 Rockville 344 2011
26
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)nichd.nih.gov

This organization conducts and supports research on various aspects of health and development in the United States and worldwide Visit their website for more information

Research Services 🇺🇸 Bethesda 336 1962
27
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)niddk.nih.gov

Supports medical research, grants to universities, government scientists conducting research on chronic diseases, research training, and provides science-based information to patients and professionals

Research Services 🇺🇸 Bethesda 334 1950
28
Foundation Fighting Blindnessfightingblindness.org

Dedicated to funding research for preventions, treatments, and cures for various retinal degenerative diseases affecting individuals worldwide

Research Services 🇺🇸 Columbia 186 1971
29
HAIhistoryassociates.com

A team of researchers, storytellers, and museum professionals providing historical research, exhibit scripts, digital timelines, and archival support services worldwide

Research Services 🇺🇸 Derwood 185 1981
30
Smithsonian Environmental Research Centerserc.si.edu

A research center studying marine biology, ecology, invasive species, global change, and pollution in coastal zones worldwide with a public hiking trail

Research Services 🇺🇸 Edgewater 184 1965
31
Johns Hopkins Technology Ventures (JHTV)ventures.jhu.edu

Advancing innovation ecosystems by translating Johns Hopkins University's research into accessible technologies, products, and services for societal benefit

Research Services 🇺🇸 Baltimore 179 2014
32
Naval Medical Research Commandmed.navy.mil

Conducts research in a wide range of areas from infectious diseases to combat casualty care to support Navy, Marine Corps, and US warfighters

Research Services 🇺🇸 Silver Spring 170 1942
33
BIOQUALbioqual.com

Accredited facility providing trained staff for research in infectious diseases, cancer, and other in vivo and in vitro studies

Research Services 🇺🇸 Rockville 169 1981
34
AAALAC Internationalaaalac.org

A nonprofit organization promoting humane treatment of animals in science through voluntary accreditation programs for research institutions worldwide

Research Services 🇺🇸 Frederick 168 1965
35
Center for Scientific Review (CSR)csr.nih.gov

The company serves as the gateway for NIH grant applications, organizing peer review groups to evaluate research grant applications for scientific merit

Research Services 🇺🇸 Bethesda 155 1946
36
National Institute of Dental and Craniofacial Research (NIDCR at NIH)nidcr.nih.gov

A federal agency dedicated to research on dental, oral, and craniofacial health and disease as part of the National Institutes of Health

Research Services 🇺🇸 Bethesda 146 1948
37
HEMI - Hopkins Extreme Materials Institute at Johns Hopkins Universityhemi.jhu.edu

A leading research institute at Johns Hopkins University focusing on advancing materials science for extreme conditions to protect people and the planet

Research Services 🇺🇸 Baltimore 43 2012
38
Technology Assessment & Transfer, Inctechassess.com

A high technology company develops and commercializes advanced ceramic materials for defense, bio-medical, and industrial applications, focusing on innovation and technology assessments for government agencies

Research Services 🇺🇸 Annapolis 10 1991

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How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.

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