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Meet Our Staff
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Vishweshwar Ranga, MD
Internal Medicine
Principal Investigator
Vishweshwar Rao Ranga, MD, is an accomplished medical professional who has amassed extensive clinical trial experience at Sierra Clinical Research. As Principal/Sub Investigator, he has played an integral role in numerous pivotal studies across diverse therapeutic areas, including asthma, heart failure, liver diseases, and pulmonary conditions. Dr. Ranga has demonstrated his dedication to advancing medical knowledge through his involvement in Phase II and III trials, showcasing expertise in evaluating the efficacy and safety of various treatments. With a profound understanding of research protocols and a commitment to patient care, he continues to contribute significantly to the field of clinical research.
Naresh Pratap Singh, MD
Pulmonology
Principal Investigator
Dr. Naresh Pratap Singh, MD, is a distinguished medical professional and Principal/Sub Investigator at Sierra Clinical Research, where he has significantly advanced medical knowledge through clinical trials. With a career spanning over three decades, he also holds a senior partnership at Pulmonary Associates, Inc., and roles as Medical Director at Kindred Hospital and Health South Rehabilitation Hospital. Dr. Singh further contributes as an Adjunct Assistant Professor at Touro University Nevada and Clinical Instructor at the University of Nevada School of Medicine, fostering the next generation of medical professionals. His blend of clinical expertise and academic leadership makes him a pivotal figure in healthcare.
Vishvinder Sharma, MD
Gastroenterology
Principal Investigator
Dr. Vishvinder Sharma, MD, is a prominent medical professional and Principal Investigator at Sierra Clinical Research, significantly contributing to medical advancements through diverse clinical trials. He serves as an Adjunct Clinical Assistant Professor of Medicine at UNLV Medical School, where he shapes future medical practitioners. As a Gastroenterologist at Digest Associates LLP and Program Director for the Gastroenterology Fellowship at Valley Hospital, his expertise is notable. Dr. Sharma's roles at Touro University Nevada further highlight his commitment to academic and professional development in gastroenterology.
Brian James Carlson, MD
Gastroenterology
Principal Investigator
Dr. Brian James Carlson, MD, is a distinguished medical professional with a wealth of expertise in the field of gastroenterology. Serving as a Principal Investigator at Sierra Clinical Research, Dr. Carlson is dedicated to advancing medical knowledge through his involvement in a diverse range of clinical trials. His commitment to education is evidenced by his role as the Associate Director of the Gastroenterology Fellowship Program at Valley Hospital Medical Center. As a Gastroenterologist at Digestive Associates, LLP, he contributes significantly to patient care and is esteemed for his role as GI Service Line Director at Sonora Regional Medical Center in California. Dr. Carlson's impressive educational background, including his Fellowship in Gastroenterology at U.C.I. Medical Center, and his extensive clinical experience highlight his passion for delivering exceptional medical care and contributing to the advancement of gastroenterological research.
Dhiresh Joshi, MD
Infectious Disease
Principal Investigator
Director of Infectious Diseases for the Internal Medicine Residency Program at Valley Hospital. Dr. Joshi's commitment to education is further exemplified by his positions as a Clinical Assistant Professor at the University of Nevada School of Medicine and Michigan State University School of Medicine. He has demonstrated leadership in various medical institutions, including his roles as Director of Infectious Disease at Kindred Hospital, Orthopedic Specialty Hospital of Nevada, Encompass Rehab Hospital, Horizon Specialty Hospital, and Clinic of Infectious Disease Specialist in Las Vegas. With a comprehensive educational background, board certifications, and numerous leadership positions, Dr. Joshi continues to make significant contributions to the field of infectious diseases and healthcare leadership.
Maya Pudi Dhillon
MBS, CRC
Site Director
Maya Pudi, MBS, CCRC, is an experienced professional in the field of clinical research site management. With a solid track record in managing research operations, Maya serves as the Site Director and Research Coordinator at Sierra Clinical Research in Las Vegas, Nevada. Her extensive experience also includes leadership roles at Sherman Clinical Research in Texas as Site Director and lead clinical research coordinator. Maya previously was Site Director at Anderson Medical Research in South Carolina. Maya's early dedication to advancing medical knowledge is evident through her contributions as a Summer Research Assistant at Greenville Health System and a Research Assistant at Emory University Hospital Midtown. Maya also worked as a research assistant at Upstate Pharmaceutical Research in Greenville, South Carolina. Maya holds a Master's degree in Biomedical Science from The Commonwealth Medical College and a Bachelor's degree from New York University with a major in Biology and minors in Chemistry and Psychology. Maya has contributed to medical literature with publications such as a review on pain management for pancreatic head adenocarcinoma and a study on catheter-based renal arterial denervation. As a Certified Clinical Research Coordinator, she plays a pivotal role in facilitating clinical research and furthering scientific understanding.