Founders and Leadership


Jeffrey Apter, MD
Jeffrey T. Apter, MD
President, co-founder

Jeffrey T. Apter, M.D., co-founder and President of Global Clinical Trials, President and Medical Director of Princeton Medical Institute and Global Medical Institutes, directs clinical trials in the areas of CNS and especially Alzheimer’s disease. Dr. Apter has been the Principal Investigator for over 300 trials in Depression, Anxiety disorders, Bipolar Disorder, Schizophrenia and Alzheimer’s Disease.

Dr. Apter, a nationally renowned psychopharmacologist, is a senior attending physician at the University Medical Center at Princeton and a research collaborator in the Department of Psychology at Princeton University. Dr. Apter has been actively involved in the Alzheimer Association and is a member of the NJ Alzheimer Association Scientific Advisory Board.

Eugene Selivra, MD
CEO, co-founder

Eugene Selivra, MD, is a co-founder and Chief Executive Officer of Global Clinical Trials since its inception. He is responsible for global operational oversight and international corporate development.

Dr. Selivra received his medical degree from Pavlov Medical School in St. Petersburg, Russia. He was a head of geriatric department at the prestigious Bekhterev Psychiatric Institute. Lately, he is a visiting professor at Skoltech, a leading Russian Skolkovo Institute of Science and Technology, where he teaches course: “Clinical trials as an essential part of the innovation process in the pharmaceutical development” for post-graduate international students.

Dr. Selivra has over 25 years of experience conducting and managing clinical trials in the US and throughout Central-Eastern EU countries, Russia and Ukraine. He has completed multiple trainings by FDA, Association of Clinical Research Professionals, Drug Information Association.


Roxana G. Darie,
Managing Director,
Legal Affairs

Ms. Darie leads Legal Affairs and GCT regional office in Romania, since late 2015. She previously held the positions of COO, Country Manager, and Legal Affairs Manager for several European CROs.

Her clinical research experience includes a wide range of tasks within the pharmaceutical industry in Romania.

Ms. Darie holds an MBA in Law and a postgraduate degree in Competition Culture. Besides her mother tongue, Roxana is fluent in English, Spanish and Italian.

Natalia Katsnelson,
Senior Director,
Business Development

Ms. Katsnelson has 10 years of experience in Life Science, Pharma and CRO business development. She leads the global business development team at GCT and is responsible for development and growth of relations with the corporate clients.

During her career at GCT Natalia has accumulated an expertise in business proposals, contracts, corporate presentations for company’s core clients within CNS, Ophthalmology, Oncology, Rare diseases, and other therapeutic areas. She is regularly attending and speaking at the relevant industry conferences. She coordinates global and region-targeted marketing and sales activities.

Ms. Katsnelson holds a masters’ degree in public relations and applied communications from Electro-Technical State University of St. Petersburg, Russia.

Vladimir Seredyuk,
Quality Assurance

Vladimir Seredyuk, MD, is a licensed physician with over 10 years of experience in different areas of clinical research. Following the award of his medical degree in the Medical-Military Academy n.a. S.M. Kirov in St.-Petersburg, Mr. Seredyuk has accomplished a special course of English at Defense Language Institute and then an Officer Basic Course at US Army Medical Center & School in San Antonio, Texas. After a few years he started a career in clinical research and became CRA for one of the Eastern European CROs. Holding different positions, including Senior CRA positions at WWCT and Medpace CROs, he has successfully passed a number of EMEA and FDA inspections, and later on completed the auditing course to become a QA professional. Dr. Seredyuk has been with GCT QA team since 2014.

Daria Podgorska,
MD, Ph.D., MBA
Managing Director,
Safety Officer (Physician),
Medical Monitor

Being the founding member of numerous professional associations and research institutions, he has the knowledge, authority and enthusiasm to navigate clinical research programs in various regions and therapeutic areas.

Umakanta Sahoo,
Managing Director,
Data Management Lead

Having more than 20 years of experience managing full-service operations in Asian countries for global CROs, Dr. Sahoo is responsible for country management and business development within India at GCT. He is in charge of, Global Data Management, Biostatistics, and Medical Writing services.

Dr. Sahoo has been at the roots of clinical trial industry development in India, beginning his carrier in the early 90s. He has worked at Quintiles as a Project Manager before he was invited to establish and head the operations of Chiltern CRO in India and Asia Pacific. He later switched to the Data Management side of the industry as a Director at Cytel.

He received his Bachelor’s in Bio-Science from Odisha University of Agriculture and Technology, his PhD from the Sardar Patel University, and MBA from Institute of Rural Management.