About ERG
Medicine Moving Forward
As a dynamic independently held clinical research site company, ERG offers a deep bench of specialized expertise in more than 50 specific indications, with unparalleled capabilities in CNS studies.
Our Mission
ERG’s mission is to provide the highest quality clinical trial execution across all clinical research phases to help sponsors speed life-saving and life-enhancing therapeutics to market as quickly and safely as possible.
ERG History Timeline

- 1998
- 2014
- 2015
- 2015
- 2015
- 2015
- 2016
- 2016
- 2017
- 2017
- 2017
- 2017
- 2017
- 2018
- 2018
- 2018
- 2019
- 2019
- 2019
- 2019
- 2020
- 2021
- 2021
- 2022
- 2022
1998-Thievon-Wright Consulting Group (TWCG) established
Thievon-Wright Consulting Group (TWCG) established
2014-ERG formed via merger of TWCG, St. Louis Clinical Trials (SLCT), Woodland Research Northwest (WRN), and Woodland International Research Group (WIRG)
ERG formed via merger of TWCG, St. Louis Clinical Trials (SLCT), Woodland Research Northwest (WRN), and Woodland International Research Group (WIRG)
2015-ERG acquires Pacific Research Network
ERG acquires Pacific Research Network
2015-ERG acquires Midwest Clinical Research Center (MCRC)
ERG acquires Midwest Clinical Research Center (MCRC)
2015-WRN opens new 24-bed clinical research unit (CRU) in Rogers, AR
WRN opens new 24-bed clinical research unit (CRU) in Rogers, AR
2015-WIRG opens a 14-bed pediatric/specialty CRU
WIRG opens a 14-bed pediatric/specialty CRU
2016-PRN opens site in Rancho Bernardo, CA bringing research opportunities to large 55+ community
PRN opens site in Rancho Bernardo, CA bringing research opportunities to large 55+ community
2016-ERG acquires Clinical Pharmacology of Miami, a 120-bed phase I CRU
ERG acquired Clinical Pharmacology of Miami, a 120-bed phase I CRU
ERG acquires post-surgical pain specialty group Endeavor Clinical Trials (ECT)
ERG acquires post-surgical pain specialty group Endeavor Clinical Trials (ECT)
2017-ERG expands pain capabilities with acquisition of Endeavor Clinical Trials & begins collaborations with Lotus Clinical Research
ERG expands pain capabilities alongside Endeavor Clinical Trials and with collaboration from Lotus Clinical Research
2017-ECT opens new in-patient pain unit
Endeavor Clinical Trials opens new, dedicated 6-bed IP post-surgical pain CRU
2017- Brain Matters Research acquired by ERG, deepening commitment in Neurological research
Brain Matters Research acquired by ERG, deepening commitment in Neurological research
2017 – Midwest & St. Louis Clinical Trials establish post-op pain clinic
Midwest Clinical Research Center & St. Louis Clinical Trials establish post-op pain clinic
2018-ERG acquires Neuropsychiatric Research Center
ERG acquires Neuropsychiatric Research Center
2018-ERG initiates NASH/diabetes growth initiative, hiring Sherwyn Schwartz, MD
ERG initiates NASH/Diabetes growth initiative, hiring KOL Sherwyn Schwartz, MD
2018-Brain Matters brings research services to underserved region of Stuart, FL
Brain Matters brings research services to underserved region of Stuart, FL
2019-ERG expands psychiatric/ pediatric capabilities by acquiring Finger Lakes Clinical Research
ERG expands psychiatric/ pediatric capabilities by acquiring Finger Lakes Clinical Research
2020-Endeavor Clinical Trials opens new purpose-built, state-of-the-art inpatient unit with on-site operating rooms
Endeavor Clinical Trials opens a new purpose-built, state-of-the-art 18 bed in-patient unit with two fully accredited on-site operating rooms
2019-ECT builds new 15-bed in-patient unit with two on-site operating rooms
Endeavor Clinical Trials builds new 18-bed inpatient unit with two on-site operating rooms
2019-New ERG logo emphasizes the people at the heart of everything we do
New ERG logo emphasizes the people at the heart of everything we do
2020-ERG acquires Richmond Behavioral Associates, expanding capacity and expertise in neurology and psychiatry
ERG acquires Richmond Behavioral Associates, expanding capacity and expertise in neurology and psychiatry
2021-ERG & Lotus Merge to offer end to end solutions for clients
ERG & Lotus merge to offer full clinical & CRO services for clients
2021-CNS Ratings joins ERG portfolio
CNS Ratings joins ERG portfolio
Lotus Clinical Research expands scientific services to include rater training solutions
Lotus Clinical Research expands scientific services to include rater training solutions
RBA moves to new location and begins buildout for a new state-of-the-art 8-bed inpatient unit
RBA moves to new location and begins buildout for a new state-of-the-art 8-bed inpatient unit
The Foundation: Executional Excellence
ERG was founded to help critical new therapeutics accelerate through the pipeline. We succeed via centralized centers of excellence that manage the financial and administrative aspects of clinical trials, freeing clinicians to focus on the science. As we have grown, we have made platform investments in clinical operations, quality and compliance, human capital, finance, and technology—investments that deepen the support we provide our partners.
Through this nationwide platform, we simplify budgeting and contracting negotiations. We streamline recruitment and regulatory planning. We deliver consistent quality, minimizing both noise and the placebo effect. The result: sponsors are confident in their data—and pleased to have saved both time and money in the process.
ERG provides a one-stop solution for clinical research needs
Inpatient/Outpatient

Clinical Trial Phase

Therapeutic Area

Extensive Clinical Research Trial Capabilities
ERG combines industry-leading experts with specialized facilities and access to over 32 million potential patients to support sponsors at every step of the clinical research journey.
We conduct both inpatient and outpatient Phase I-IV clinical research studies. Our robust network of owned and affiliated clinical research sites includes a Phase I clinical pharmacology unit, several early-phase specialty units, a purpose-built research facility specializing in acute pain with two dedicated operating rooms, and two postoperative surgical analgesic facilities. Our centers have sophisticated pharmacy capabilities, including infusion and formulation; on-site testing capabilities such as polysomnography (PSG), quantitative electroencephalography (qEEGs) and EEGs, FibroScans®, cerebrospinal fluid (CSF) sampling; and off-site supplemental services from medical imaging to ophthalmology through collaborative agreements.
Our principal investigators are renowned in their fields, with expertise developed over thousands of clinical trials and shared through hundreds of papers and posters. They are supported by highly trained staff and expert clinical raters, each certified on multiple scales used in various CNS indications.
We recruit patients from a large and growing database of people suffering from mental illness, neurological disorders, sleep disorders, addictions, diabetes, and other illnesses, as well as normal healthy volunteers who participate in trials for the advancement of medicine. ERG’s community outreach, educational programs and patient engagement activities ensure that the databases are current and constantly expanding.
Through all these paths, ERG continues to grow its capabilities and expand into indications where there are tremendous unmet medical needs in the United States and globally.