What is a SMO?

Table of Contents

Last Updated: March 12th, 2026

A site management organization (SMO) is an organization that provides services to the investigator at a clinical site. SMOs can perform all the work involved in clinical trial at the site.

SMO Services

Site Management Organizations (SMOs) provide a many of the necessary services needed to facilitate a successful clinical trial. The goal of the services offered by a SMO is to streamline the clinical trial process, improve data quality, and to make sure the clinical trial is in compliance with regulatory standards.

SMO services are geared towards helping pharmaceutical, biotech, and medical device companies easily and seamlessly navigate the complexity of a clinical trial. Here are some typical services offered by SMOs:

Site Identification and Setup
SMOs help identify and set up clinical trial sites that meet the necessary requirements for the study, including infrastructure and personnel qualifications.
Patient Recruitment and Retention
They develop strategies to recruit and retain suitable trial participants to meet enrollment targets quickly and maintain patient engagement throughout the study.
Regulatory Compliance
SMOs manage and oversee all regulatory compliance issues related to the trial, including obtaining necessary approvals from regulatory bodies and ensuring that the trial follows local, national, and international guidelines.
Training and Support
Providing training for site staff on clinical trial protocols, data collection methods, and the use of any specific technology or software required for the trial. This ensures all processes are standardized and errors are minimized.
Data Management
This includes collecting, storing, and managing trial data to ensure its accuracy, integrity, and confidentiality. Effective data management also involves setting up electronic data capture (EDC) systems and ensuring proper data validation.
Monitoring
SMOs conduct regular monitoring visits to sites to ensure the trial is conducted according to the protocol, to verify data accuracy, and to address any issues that arise during the trial’s execution.
Quality Assurance
Implementing quality control processes to ensure that all aspects of the trial are conducted in compliance with the highest standards, from adherence to protocols to the ethical treatment of participants.
Financial Management
Managing the budget of the clinical trial, including payments to trial sites and other financial transactions related to the conduct of the trial.
Logistics Coordination
Handling the logistics of the trial, such as the distribution of trial materials and supplies, including investigational drugs, to various sites.
Reporting
Generating reports for stakeholders that provide insights into the trial’s progress, preliminary results, and compliance status.

Similar to CROs, services at SMOs are done through a contractual agreement. Although the services are outsourced, the investigator at the site is still the responsible party who needs to oversee and audit the quality of any work done by the SMO.

Benefits & Risks of Using a SMO

Potential benefits of outsourcing to SMOs include:

Reduction of time and resources needed to conduct a clinical trial.
Lower initial investment and on-going costs in hiring personnel, equipment, and facilities needed.
Expanded pool of access to expertise.
Access to standardized processes of clinical trial conduct.
Better data collection and management.

Potential risks of outsourcing to SMOs include:

Reduced control in direct management of clinical trial conduct.
Potential budget overruns due to unexpected delays.
Consistency from project to project may vary depending on personnel turnover at SMOs.

Growing Trend in Outsourcing Work to CROs

The trend toward outsourcing clinical trial work to CROs has only accelerated since the early 2010s. As clinical trials are conducted more and more globally, and as trial designs grow more complex, sponsors ranging from large pharmaceutical companies to small biotechs are relying on CROs to provide the operational infrastructure, regulatory expertise, and global reach needed to run modern studies.

The global CRO market has grown substantially and is now valued at over $90 billion, with continued strong growth projected through the end of the decade. Large CROs with global reach continue to dominate the market with full-service offerings, while mid-size and specialty CROs have carved out important niches in areas like specific therapeutic areas, rare diseases, and regional expertise.

Major CROs in 2026

The CRO landscape has changed dramatically through mergers and acquisitions over the past decade. Several of the companies that were well-known names in 2014 have since merged, been acquired, or rebranded. Here is an updated look at some of the largest and most recognized CROs operating today:

IQVIA
The largest CRO globally by revenue, with approximately 85,000 employees in over 100 countries. IQVIA was formed in 2016 through the merger of Quintiles and IMS Health. It is known for its data analytics capabilities and technology-driven approach to trial management.
ICON plc
A major global CRO that significantly expanded through its 2021 acquisition of PRA Health Sciences. ICON is known for its work across a wide range of therapeutic areas and its digital trial management platforms.
PPD (Thermo Fisher Scientific)
PPD was acquired by Thermo Fisher Scientific in 2021 and now operates as part of Thermo Fisher’s clinical research division. It offers end-to-end clinical development services and benefits from Thermo Fisher’s extensive global laboratory network.
Parexel
One of the longest-established CROs, Parexel continues to operate under its own name after being taken private by Pamplona Capital Management in 2017 (later acquired by EQT and Goldman Sachs). Parexel is known for its regulatory consulting expertise and patient-focused trial design.
Syneos Health
Formed in 2017 through the merger of INC Research and inVentiv Health. Syneos was taken private by Elliott Investment Management in 2023. It is known for combining clinical research services with commercial consulting.
Fortrea
A newer name in the CRO space, Fortrea was spun off from Labcorp’s Drug Development segment in 2023 as an independent, publicly traded CRO. Fortrea’s roots trace back to Covance, which Labcorp acquired in 2015.
Medpace
A full-service, mid-size CRO headquartered in Cincinnati, Ohio, known for its strong therapeutic expertise and physician-led approach. Medpace is a popular employer for CRAs and has been growing steadily.
Labcorp
While Fortrea now handles the traditional CRO services, Labcorp retains significant clinical trial capabilities through its central laboratory, bioanalytical, and genomics services.
Charles River Laboratories
Primarily known for preclinical and early-stage research services rather than late-phase clinical monitoring, but remains an important player in the broader drug development services landscape.
WuXi AppTec
A leading global CRO and contract development and manufacturing organization (CDMO) based in China, with an extensive service platform spanning laboratory, clinical, and manufacturing services.

The FSP Model

One important development in the CRO industry that is worth understanding is the rise of the Functional Service Provider (FSP) model. Under the traditional outsourcing model, a sponsor contracts with a CRO to run an entire study (or set of studies) as a project. Under the FSP model, a sponsor contracts with a CRO to provide dedicated staff such as CRAs, data managers, or regulatory specialists who work embedded within the sponsor’s own team and processes.

The FSP model has become one of the most common engagement types in clinical research today. Many CRA job postings you will see on job boards are FSP roles, often described as “sponsor-dedicated” positions. For CRAs, an FSP role can offer a blend of CRO employment (job security, training programs, career support) with the experience of working closely with a single sponsor’s pipeline and therapeutic area.

The Outsourcing Trend Continues

Whether through full-service outsourcing or the FSP model, the trend of sponsors relying on CROs for clinical trial execution remains strong. For CRAs and other clinical research professionals, CROs continue to be one of the largest and most accessible employers in the industry. Learn more about what it’s like working as a CRA at a CRO, or explore how to get into a CRA role including through CRO entry-level training programs.