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Hire Dr. Guillermo A B.

United States

USD 85 /hr

Physician & MBA | Clinical Research, Trial Operations, and Scientific Writing from Concept to Publication.

Profile Summary

As a Physician with an MBA in Healthcare Administration, I bring a unique blend of clinical expertise, research operations, and academic writing skills. At Mayo Clinic, I work as a Research Program Coordinator and Senior Clinical Trial Manager, leading high-impact clinical trials in gastrointestinal and neurogastroenterology research. My work spans multicenter industry-sponsored studies and investigator-initiated trials, where I coordinate everything from protocol development and IRB submissions to data auditing and manuscript preparation. I also serve as a core member of the Department of Medicine’s Phenotyping Project, where I design REDCap databases and digital workflows across multiple specialties to support data-driven discovery. This hands-on role has sharpened my expertise in patient-reported outcomes (PROMIS, PAGI-SYM, PAC-SYM, PAGI-QoL, etc.), survey licensing, and electronic data capture validation. Beyond operations, I actively contribute to scientific writing and publication efforts, co-authoring manuscripts, abstracts, and FDA-style Investigator Brochures. I help teams translate complex clinical data into publication-ready deliverables for peer-reviewed journals and conferences. Through my consulting work, I support Principal Investigators, biotech startups, and academic teams with tailored clinical trial services, including: ✔ Protocol & Informed Consent Development ✔ IRB/Regulatory Support & FDA-Style Documentation ✔ REDCap Project Design & Data Management ✔ Lab Manuals & Clinical Documentation ✔ Manuscripts, Abstracts & Conference Submissions I am passionate about streamlining research operations, enhancing participant engagement, and advancing biomedical discovery. Whether you’re launching a new trial, scaling an existing program, or seeking support with data analysis and publications, I can serve as a strategic partner from concept to completion.

Subject Matter Expertise

• ★ IRB Applications
• ★ Clinical Trial Design
• ★ Healthcare Administration & Management
• ☆ Biostatistics
• ☆ Data Analysis
• ☆ Drug Discovery
• ☆ Phenotypic Assays
• ☆ Clinical Trials
• ☆ Patient Recruitment
• ☆ Clinical Data Management
• ☆ Clinical Trial Site Selection & Monitoring
• ☆ Clinical Trials Data Analysis
• ☆ Pharmacovigilance/Drug Safety Monitoring
• ☆ Hospice & Palliative Medicine
• ☆ Managed Healthcare
• ☆ Regulatory Affairs

Services

• Writing
• Research
• Consulting
• Data & AI
• Product Development

Writing Clinical Trial Documentation, Medical Writing, Non-Medical Regulatory Writing, Technical Writing, Business & Legal Writing

Research Feasibility Study, Gap Analysis, Scientific and Technical Research, Systematic Literature Review

Consulting Healthcare Consulting, Scientific and Technical Consulting, Financial Consulting

Data & AI Statistical Analysis, Data Mining, Data Cleaning

Product Development Product Evaluation, Concept Development, Prototyping

Work Experience

Clinical Trial Manager

Mayo Clinic in Arizona

October 2022 - Present

Postdoctoral Research Fellow

Johns Hopkins University

May 2018 - October 2022

Research Fellow - Infectious Diseases

University of Louisville

January 2015 - April 2018

Education

MBA Healthcare Administration

Cerem Business School

May 2018 - May 2020

Master in Excutive Leadership Development

Universidad Nebrija

May 2018 - May 2020

MBA Healthcare Administration

Universidad Nebrija

May 2018 - May 2020

Doctor in Medicine (School of Medicine)

University of El Salvador

January 2004 - March 2012

Certifications

• AI Foundations and Applications for Emerging Digital Healthcare Leaders

  Mayo Clinic College of Medicine and Science

  July 2025 - Present

• ECFMG Certification

  Educational commission for foreign medical graduates

  October 2013 - Present

• GCP for Clinical Trials with Investigational Drugs and Medical Devices (U.S. FDA Focus)

  CITI Program

  October 2022 - October 2025

Publications

JOURNAL ARTICLE

Pasricha, Pankaj J., McKnight, Megan, Villatoro, Luisa, Barahona, Guillermo, Brinker, Jeffrey, Hui, Ken, Polydefkis, Michael, Burns, Robert, McMahan, Zsuzsanna H., Gould, Neda, et al. (2024). Joint Hypermobility, Autonomic Dysfunction, Gastrointestinal Dysfunction, and Autoimmune Markers: Clinical Associations and Response to Intravenous Immunoglobulin Therapy .

Pasricha, Pankaj J, McKnight, Megan, Villatoro, Luisa, Barahona, Guillermo, Brinker, Jeffrey, Hui, Ken, Polydefkis, Michael, Burns, Robert, McMahan, Zsuzsanna H, Gould, Neda, et al. (2024). Joint Hypermobility, Autonomic Dysfunction, Gastrointestinal Dysfunction, and Autoimmune Markers: Clinical Associations and Response to Intravenous Immunoglobulin Therapy .

Barahona, Guillermo, Mc Bride, Barry, Moran, Áine, Harrison, Ricky, Villatoro, Luisa, Burns, Robert, Konings, Bo, Bulat, Robert, McKnight, Megan, Treisman, Glenn, et al. (2024). Validation of a Hand-Held Point-of-Care Device to Measure Breath Hydrogen and Its Utility in Detecting Response to Antibiotic Treatment .

Barahona, Guillermo, Mc Bride, Barry, Moran, Áine, Harrison, Ricky, Villatoro, Luisa, Burns, Robert, Konings, Bo, Bulat, Robert, McKnight, Megan, Treisman, Glenn, et al. (2024). Validation of a Hand-Held Point-of-Care Device to Measure Breath Hydrogen and Its Utility in Detecting Response to Antibiotic Treatment .

Konings, Bo, Villatoro, Luisa, Van den Eynde, Jef, Barahona, Guillermo, Burns, Robert, Mcknight, Megan, Hui, Ken, Yenokyan, Gayane, Tack, Jan, Pasricha, Pankaj Jay (2023). Gastrointestinal syndromes preceding a diagnosis of Parkinson's disease: testing Braak's hypothesis using a nationwide database for comparison with Alzheimer's disease and cerebrovascular diseases.

Konings, Bo, Villatoro, Luisa, Van den Eynde, Jef, Barahona, Guillermo, Burns, Robert, McKnight, Megan, Hui, Ken, Yenokyan, Gayane, Tack, Jan, Pasricha, Pankaj Jay (2023). Gastrointestinal syndromes preceding a diagnosis of Parkinson's disease: testing Braak's hypothesis using a nationwide database for comparison with Alzheimer's disease and cerebrovascular diseases .

Konings, Bo, Villatoro, Luisa, Van den Eynde, Jef, Barahona, Guillermo, Burns, Robert, McKnight, Megan, Hui, Ken, Yenokyan, Gayane, Tack, Jan, Pasricha, Pankaj Jay (2023). Gastrointestinal syndromes preceding a diagnosis of Parkinson’s disease: testing Braak’s hypothesis using a nationwide database for comparison with Alzheimer’s disease and cerebrovascular diseases .

Konings, Bo, de Barahona, Luisa Villatoro, Barahona, Guillermo, Burns, Robert, McKnight, Megan, Hui, Ken Y., Jones, Michael P., Tack, Jan F., Pasricha, Pankaj J. (2023). Mo1027 DIFFERENCES IN THE INCIDENCE AND PREVALENCE OF GASTROPARESIS IN THE WHITE, BLACK AND HISPANIC POPULATION: AN ANALYSIS OF A NATIONWIDE DATABASE .

Konings, Bo, de Barahona, Luisa Villatoro, Barahona, Guillermo, Burns, Robert, McKnight, Megan, Chumpitazi, Bruno P., Shulman, Robert J., Pasricha, Pankaj J. (2023). Mo1998 THE MORBIDITY AND MORTALITY BURDEN OF PEDIATRIC GASTROPARESIS: A NATION-WIDE ANALYSIS OF ACADEMIC MEDICAL CENTERS .

McBride, Barry, Lafferty, Eoghan, Waechter, Catherine, Shortt, Claire, Harte, Peter, Shortt, Aonghus, Barahona, Guillermo, Pasricha, Pankaj (2023). S1813 Comparison of an At-Home Hydrogen Methane Breath Analysis Device With Reference Benchtop Devices .

Barahona, Guillermo, Villatoro, Luisa, Treisman, Glenn, McKnight, Megan, Burns, Robert, McClure, Candace K., Liebler, Eric, Pasricha, Pankaj (2023). S1846 Non-Invasive Vagal Nerve Stimulation Reduces Nausea Rescue Medication in Patients With Gastroparesis and Related Disorders, With Additional Benefits on Multiple Other Associated Symptoms .

Konings, Bo, Villatoro, Luisa G., Barahona, Guillermo A., Burns, Robert, McKnight, Megan, Potter, James J., Hui, Ken Y., Yenokyan, Gayane, Pasricha, Pankaj J. (2022). 470: DIFFERENCES IN THE EPIDEMIOLOGY, TREATMENT AND OUTCOMES OF BLACK PATIENTS WITH GASTROPARESIS IN A NATIONWIDE ANALYSIS OF ACADEMIC MEDICAL CENTERS .

Konings, Bo, Villatoro, Luisa G., Eynde, Jef Van den, Barahona, Guillermo A., Burns, Robert, McKnight, Megan, Hui, Ken Y., Pasricha, Pankaj J. (2022). 803: DOES PRIOR GASTROINTESTINAL (GI) DYSFUNCTION PREDICT THE DEVELOPMENT OF PARKINSON'S DISEASE: TESTING THE BRAAK HYPOTHESIS USING A LARGE NATIONAL DATABASE .

Konings, Bo, Villatoro, Luisa G., Barahona, Guillermo A., Burns, Robert, McKnight, Megan, Hui, Ken Y., Pasricha, Pankaj J. (2022). IMPACT OF THE EPISOD TRIAL ON PRACTICE: A RETROSPECTIVE STUDY USING A NATIONWIDE ELECTRONIC HEALTH RECORD NETWORK .

Barahona, Guillermo, Moran, Aine, McBride, Barry, Harrison, Kedrick, Villatoro, Luisa, Burns, Robert, Konings, Bo, Bulat, Robert, McKnight, Megan, Shortt, Claire, et al. (2022). S1575 The Use of Post-Prandial Breath Hydrogen to Monitor Antibiotic-Induced Changes in the Activity of the Gut Microbiome .

Konings, Bo, Villatoro, Luisa, Barahona, Guillermo, Burns, Robert, McKnight, Megan, Hui, Ken, Pasricha, Pankaj Jay (2022). S519 Impact of COVID-19 on Motility Practices: New Onset Gastrointestinal and Autonomic Dysfunction After COVID-19 and the Effects of Vaccination in a Nationwide Cohort Study .

Barahona, Guillermo A., Villatoro, Luisa G., Konings, Bo, Burns, Robert, McKnight, Megan, Bulat, Robert S., Pasricha, Pankaj J. (2022). Sa1488: AN OPEN-LABEL TRIAL OF THE PPAR-γ LIGAND PIOGLITAZONE FOR IDIOPATHIC GASTROPARESIS: A FIRST STEP TOWARDS DISEASE MODIFYING THERAPY .

Pasricha, Pankaj J., Grover, Madhusudan, Yates, Katherine P., Abell, Thomas L., Bernard, Cheryl E., Koch, Kenneth L., McCallum, Richard W., Sarosiek, Irene, Kuo, Braden, Bulat, Robert, et al. (2021). Functional Dyspepsia and Gastroparesis in Tertiary Care are Interchangeable Syndromes With Common Clinical and Pathologic Features .

Barahona, Guillermo, Moran, Áine, Bride, Barry Mc, Villatoro, Luisa, Burns, Robert B., Konings, Bo, Bulat, Robert S., McKnight, Megan E., Pasricha, Pankaj J. (2021). S1377 Postprandial Breath H2 Using a Portable Handheld App-Connected Device to Predict the Presence of Small Intestinal Bacterial Overgrowth as Well as the Response to Antibiotic Treatment .

Barahona, Guillermo A., Villatoro, Luisa G., Mcknight, Megan, Burns, Robert, Shortt, Claire, Mcgovern, Niall, Pasricha, Pankaj J. (2021). Sa384 BREATH HYDROGEN RESPONSES MEASURED BY A NOVEL PORTABLE HYDROGEN BREATH ANALYZER AND SMART PHONE APP USED AT HOME CAN DISTINGUISH NORMAL SUBJECTS FROM PATIENTS WITH SUSPECTED SIBO .

OTHER

Konings, Bo, Villatoro, Luisa, Van den Eynde, Jef, Barahona, Guillermo, Burns, Robert, McKnight, Megan, Hui, Ken, Yenokyan, Gayane, Tack, Jan, Pasricha, Pankaj Jay (2023). Gastrointestinal syndromes preceding a diagnosis of Parkinsons disease: testing Braaks hypothesis using a nationwide database for comparison with Alzheimers disease and cerebrovascular diseases .