Engagement. Expertise. Results.

CenExel Centers of Excellence offer world-class quality and experience. ACMR champions that standard.

CenExel ACMR sets the standard for medical research, facilitating availability for safe and effective medicine to people everywhere.

CenExel ACMR is a fully dedicated 100,000 square foot, state-of-the-art research facility. We provide conscientious, recruitment-driven medical research services that are pivotal in the advancement and treatment of illnesses of the central nervous system and other therapeutic areas. Our dedicated and experienced research teams conduct clinical trials with compassion and respect for our research participants. We are a CenExel Center of Excellence, assuring unparalleled patient engagement, staff expertise, and valuable results.

Thousands of clinical trials conducted over nearly 40 years in medical research.
View Current Studies
Research Facility
CenExel ACMR encompasses 100,000 square feet of facility space, 150 beds, an on-site PBMC lab, and an on-site surgical suite.
CenExel ACMR has a proven record in recruiting, exceeding 100% of patient target.
Dr. Robert Riesenberg
Decades of industry experience lead CenExel ACMR and guide CenExel’s Psychiatric Advisory Board.
CenExel ACMR centralizes budgeting and contracting for faster study start-up.
group of people
CenExel ACMR serves a broad and diverse demographic in the surrounding area.
Debra Hoffmeyer

CenExel ACMR is STARR site certified.

STARR site certification was created to promote empathy and communication between research site staff and patients, caregivers, and advocacy groups, as well as providing tools and support for best practices around areas identified by the stakeholders of The STARR Coalition.

Center Leadership

Dr. Robert Riesenberg

Robert Riesenberg, MD

CenExel ACMR Founder and Principal Investigator
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Dr. Riesenberg is a research psychiatrist with four decades of experience. His primary focus is on CNS, PK, Healthy Normal, and Child/Adolescent disorders. Dr. Riesenberg has been the Principal Investigator in over 600 studies.

Dr. Riesenberg earned a bachelor’s degree in both Zoology and Psychology from Memphis State University in 1972. In 1975, he earned his MD from the University of Tennessee. He is licensed to practice in Georgia.


Lauren White

Director of Business Development
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Lauren White is the Director of Business Development at CenExel ACMR and CenExel CBH (both private, dedicated research facilities). CenExel ACMR and CenExel CBH are part of the CenExel Centers of Excellence collaboration of sites. For nearly four decades, CenExel ACMR and CenExel CBH have been dedicated to assisting pharmaceutical companies find new cures to help patients better manage their healthcare through performing over 2000 clinical trials. Lauren started as a research assistant and coordinator for CenExel ACMR before gaining additional research experience on the Winship Phase 1 oncology team at Emory University. Lauren rejoined CenExel ACMR and CenExel CBH in 2016.

2018 – 2020 Statistics

Therapeutic Areas

Clinical Trials

Patients Enrolled



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Reaching new heights in clinical research

Our Centers of Excellence provide unparalleled medical and scientific support in the design and execution of clinical trials. Our attention to detail assures quality, reliable results, and has helped CenExel to consistently achieve and exceed patient recruitment goals. We deliver the expertise, engagement, and results to ensure our clients achieve their clinical research goals.

To speed up study implementation, we provide centralized budgeting and contracting for sponsors engaging multiple Centers of Excellence. The geographic diversity of our network offers strong access to roughly 35 million subjects while our broad therapeutic expertise enables a variety of clinical trial strengths.

Top Therapeutic Areas of Expertise

Alzheimer’s Disease
Anxiety Disorder
Bipolar Disorder
Depressive Disorders
Parkinson’s Disease

Seasonal Influenza
Pandemic Influenza

Acute Post-op Pain:
Open Hernia Repair
Wisdom Tooth Extraction

Healthy Volunteer (all ages)
Sleep Apnea
Women’s Health

Meet our Centers of Excellence

Click on any highlighted state to see our Centers of Excellence

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