Dedicated Clinical Research Specialists Serving Our Community
Valley Institute of Research is committed to the success of our 3 stakeholders: our patients, the physicians within our community, and the Pharmaceutical Sponsors overseeing the clinical trials.
Our Mission

Valley Institute of Research is committed to the success of our 3 stakeholders: our patients, the physicians within our community, and the CROs and Pharmaceutical Sponsors overseeing the clinical trials.
Our mission is to conduct research to improve minority health and eliminate health disparities. We are focused on:
- Coordinating and evaluating health and health disparities in underrepresented populations
- Conducting and supporting research in underrepresented populations
- Promoting and supporting diverse research workforce
- Translating and distributing research information
- Fostering innovative partnerships
Everything we do puts our patients first. We are a patient-centric clinical research company and you are at the focus of all of our efforts.
Our Investigator

Dr. Alex Guevara is the owner and primary physician at Rockwood Medical Clinic in Fort Worth, Texas. He is originally from San Antonio, Texas where he graduated from the University of San Antonio with a Bachelor’s of Science degree in Biology. He attended the Texas College of Osteopathic Medicine in Fort Worth. He is Board Certified in Family Medicine.
He opened his practice , Rockwood Medical Clinic, P.A. in 1986 on the north side of Fort Worth and has practiced family medicine for the last 35 years. Dedicated to serving the Fort Worth Latino community, he has served several community roles including but not limited to: officer on the Board of Governors of the American College of Family Practitioners of the State of Texas, Board Trustee of the Texas Osteopathic Medical Association, and a Clinical Professor for TCOM/UNTHSC, UTHSC of San Antonio and Baylor College of Medicine. Dr. Guevara has also served as a Principal Investigator in numerous clinical trials across several therapeutic areas since 2003.
Our Clinic Sites
Valley Institute of Research currently operates within the Investigators’ multi therapeutic practices in Fort Worth, Harlingen, Addison, and Plano, Texas. Our Investigators have included clinical research programs to better supplement their treatment initiatives and allow greater accessibility to medicine for their community’s underserved and minority residents. Valley Institute of Research considers local community organizations to be strategic partners with whom underrepresented healthcare service segments are identified and served. We also maintain close relationships with our patients and healthy volunteers throughout our health network and our retention practices lead to more successful trial outcomes for our study sponsors.

Valley Institute of Research – Harlingen, Texas
The site is located only 5 miles from the city’s International Airport, accommodating all the major airlines. Furthermore, Harlingen is nestled in the middle of 2 heavy populated cities: Brownsville and McAllen, TX, and has experienced a significant population growth over the past decade allowing us the opportunity to serve a greater number of new patients.
The site is located between the Fort Worth Stockyards and Downtown Fort Worth. A 20 minute drive to Dallas Fort Worth Intl.(DFW) Airport, the site recruits from a local population of 1 million residents. The site continually meets and exceeds enrollment expectations thereby providing the much needed diversity element in today’s clinical trials.
Valley Institute of Research – Plano, TX
Situated just 20 minutes from DFW Airport, the Plano site is located in a rapidly growing area. Plano’s strong healthcare infrastructure and diverse community make it an ideal location for clinical trials, offering access to a wide range of potential patients for research.
Valley Institute of Research – Addison, TX
Located just 10 miles from DFW Airport, Addison is a vibrant community with easy access to Dallas. With a population of around 1,500,000 the site offers both suburban and urban recruitment opportunities. Its proximity to Dallas ensures access to a broad and diverse pool of participants for clinical trials.
The Principal Investigator Oversight & Data Integrity
A clinical trial is only as safe and successful as is the involvement of the Principal Investigator. With dedicated full-time investigators with their own built-in private practices onsite, The Probe brings a highly sought after offering of research-naive patients, and strong safety oversight to the studies it undertakes.
Operating With
Site Metrics In Mind
In the age of Risk Based Monitoring and Site Metrics, The Probe formats its internal processes around ever-changing Sponsor requirements. We understand the importance of clean and reliable data, and our staff are trained on responding to data issues rapidly and effectively. With dedicated data specialists onsite, our streamlined approach allows us to provide timely and accurate results to sponsors.
Executive Team & Expertise

We are experienced in the following therapeutic areas across Phase 2-4 clinical trials:
- Dermatology
- Gastroenterology
- Cardiology
- Endocrinology
- Medical Device
- Infectious Disease
- Musculoskeletal
- Pulmonology