Nubia Concepcion, L
Site Director

Nubia Concepcion serves as the Research Director at Quality Research of South Florida, bringing more than 24 years of clinical research experience and a deep commitment to advancing healthcare within her community. After spending over 12 years working with established research organizations, she developed a passion for expanding access to clinical research opportunities and improving patient outcomes through innovative studies.
As the leader of the organization, Ms. Concepcion is responsible for overseeing site operations, study execution, regulatory compliance, and quality assurance. She is dedicated to maintaining the highest standards of scientific rigor, ethical conduct, and participant safety throughout all phases of clinical research.
Ms. Concepcion plays a key role in the growth and success of the research center by fostering strategic relationships with physicians, sponsors, and Contract Research Organizations (CROs). She actively supports the development of new investigators by providing comprehensive onsite training, including instruction in clinical research procedures and study-related techniques.
Known for her hands-on leadership style and unwavering commitment to excellence, Ms. Concepcion ensures that every study is conducted with integrity, efficiency, and a patient-centered approach. Her vision and dedication continue to strengthen Quality Research of South Florida’s reputation as a trusted clinical research site.
Fluent in both English and Spanish, Ms. Concepcion successfully serves South Florida’s diverse communities while promoting participation in clinical research and advancing access to innovative treatment options.

Arnaldo Orellana-Molina, MD
Family Practice – Emergency Medicine
Principal Investigator

Dr. Arnaldo Orellana-Molina is an accomplished physician and clinical research leader with more than 20 years of experience conducting clinical trials throughout Florida. He has successfully led and overseen multi-specialty studies across Phase I, Phase II, Phase III, and Phase IV clinical trials, consistently demonstrating a commitment to research excellence, operational efficiency, and patient safety.

As a Principal Investigator, Dr. Orellana-Molina is dedicated to advancing medical innovation through the delivery of high-quality clinical research that meets the highest scientific, ethical, and regulatory standards. His extensive experience in study oversight, participant care, and protocol compliance has contributed to the successful execution of numerous clinical trials across a broad range of therapeutic areas.
Known for his compassionate, patient-centered approach, Dr. Orellana-Molina prioritizes the well-being of study participants while fostering a culture of professionalism, collaboration, and excellence within the research team. His leadership style promotes strong communication and productive partnerships with sponsors, Contract Research Organizations (CROs), and healthcare stakeholders, helping to ensure the timely and successful completion of clinical studies.
Fluent in both English and Spanish, Dr. Orellana-Molina is well-positioned to serve South Florida’s diverse patient population, enhancing participant engagement, recruitment, and retention while promoting access to innovative treatment options through clinical research.
His dedication to quality, regulatory compliance, and outstanding patient care has earned him a reputation as a trusted investigator and valued research partner within the clinical research community.

Why Our Investigators Matter
The clinical research team at Quality Research of South Florida brings together extensive medical expertise, clinical research experience, and a patient-centered approach to ensure the highest standards of safety, quality, and regulatory compliance. Their dedication to excellence supports sponsors, participants, and healthcare partners in advancing innovative treatments that improve patient outcomes and contribute to the future of healthcare.
Our investigators play an active role in participant recruitment and retention, leveraging real-time access to medical records and strong community relationships to identify appropriate candidates and support long-term study engagement. This proactive approach helps facilitate efficient enrollment, maintain high retention rates, and ensure the successful execution of clinical trials while preserving the integrity and quality of study data.

José Armin Felipe Gutiérrez, MD,
Neurologist
Principal Investigator

Dr. Jose Armin Felipe Gutierrez is a highly experienced neurologist with extensive expertise in the diagnosis and management of neurological and mental health conditions in both adult and pediatric populations. His strong clinical judgment, analytical skills, and patient-centered approach enable him to effectively manage complex cases while delivering high-quality care.
As both a Principal Investigator and Sub-Investigator, Dr. Gutierrez has developed a diverse clinical research background, demonstrating a proven ability to lead and support clinical trials across various therapeutic areas. His collaborative approach and commitment to research excellence allow him to work effectively with sponsors, study teams, and diverse patient populations while ensuring adherence to regulatory and ethical standards.
Dr. Gutierrez’s research experience includes participation in neurology-focused clinical studies, supported by advanced diagnostic expertise in the interpretation of central nervous system (CNS) imaging and neurophysiological testing, including CT scans, MRI studies, electroencephalograms (EEGs), and nerve conduction studies/electromyography (NCS/EMG). His comprehensive understanding of neurological disorders provides valuable clinical insight throughout the research process.
In addition to his diagnostic expertise, Dr. Gutierrez possesses extensive procedural experience, including performing lumbar punctures and other specialized neurological procedures that support both clinical care and research initiatives.
Fluent in both English and Spanish, Dr. Gutierrez is dedicated to providing compassionate, evidence-based care and advancing the development of innovative therapies through high-quality clinical research. His commitment to patient safety, scientific rigor, and regulatory compliance contributes significantly to the success of clinical trials and the advancement of neurological healthcare.

Osleny Perez, APRN, FNP-C
Nurse Practitioner
Sub-Investigator

Osleny Perez, APRN, FNP-C, is a highly skilled Family Nurse Practitioner and foreign-trained physician dedicated to providing compassionate, patient-centered care for individuals with acute and chronic medical conditions. Her extensive clinical experience, combined with a strong commitment to quality healthcare, enables her to deliver exceptional care across diverse patient populations.

As a Sub-Investigator at Quality Research of South Florida, Ms. Perez plays an integral role in the successful conduct of multi-specialty clinical trials. She assists in study oversight, patient evaluations, protocol compliance, and the collection of high-quality clinical data while ensuring adherence to Good Clinical Practice (GCP) guidelines and FDA regulations. Her research experience spans Phase I, Phase II, Phase III, and Phase IV clinical trials.

Fluent in both English and Spanish, Ms. Perez effectively communicates with a diverse patient population, helping participants feel informed, comfortable, and supported throughout the clinical research process.

Antonio Mora, MD
Internal Medicine Physician | Sub-Investigator

Antonio Mora, MD, is a board-certified Internal Medicine physician with extensive experience in clinical practice, medical leadership, healthcare quality management, and clinical research. Throughout his career, Dr. Mora has demonstrated a commitment to delivering evidence-based, patient-centered care while advancing innovative medical therapies through clinical development.
His professional background includes experience in private practice, hospital medicine, medical directorship, quality improvement initiatives, patient safety programs, and healthcare performance management. This broad clinical and administrative expertise provides valuable insight into the design and execution of clinical research studies.
As a Sub-Investigator, Dr. Mora actively participates in Phase II, Phase III, and Phase IV clinical trials, contributing to study oversight, participant safety, protocol compliance, and data integrity. His dedication to scientific excellence and regulatory compliance supports the successful advancement of new treatments and therapies.
Licensed to practice medicine in Florida and fluent in both English and Spanish, Dr. Mora is committed to improving patient outcomes and contributing to the advancement of medical knowledge through high-quality clinical research.

Duniesky Dieguez, MD
Family Practice
Sub-Investigator

Dr. Duniesky Dieguez is a compassionate and dedicated physician with specialized training in Family Medicine, Hospice, and Palliative Medicine. He brings more than seven years of clinical research experience and has successfully led Phase II, Phase III, and Phase IV clinical trials across a variety of therapeutic areas.
As an Investigator at Quality Research of South Florida, Dr. Dieguez is committed to advancing medical innovation through the conduct of high-quality clinical research. His expertise in patient care, combined with a strong focus on regulatory compliance, patient safety, and data integrity, contributes to the successful execution of clinical studies and the development of new treatment options.
Known for his patient-centered approach, Dr. Dieguez works closely with study participants, sponsors, and research teams to ensure studies are conducted in accordance with Good Clinical Practice (GCP) guidelines, FDA regulations, and the highest ethical standards. His dedication to quality and regulatory excellence has helped establish a strong track record of reliable study outcomes and participant satisfaction.
Fluent in both English and Spanish, Dr. Dieguez effectively serves South Florida’s diverse communities, fostering trust, engagement, and accessibility throughout the clinical research process. Through his commitment to scientific advancement and compassionate care, he continues to play a vital role in improving healthcare outcomes and expanding access to innovative therapies.

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