Title: Chief Scientific Officer
Company: Mimetic Medicines, Inc.
Location: Boston, Massachusetts, United States
Rasheen Gartrell Demille Powell II, Chief Scientific Officer at Mimetic Medicines Inc., has been recognized by Marquis Who’s Who Top Scientists for dedication, achievements and leadership in Neuropharmacology.
Dr. Powell is a specialist in the neurobiology of pain, whose career is marked by a series of significant roles that have shaped his expertise and contributions to the field of pharmacology. Since December 2025, he has served as the chief scientific officer at Mimetic Medicines, a biotechnology research company headquartered in Boston, Massachusetts. In this capacity, Dr. Powell is responsible for attending scheduled meetings and coordinating daily activities, while conducting data collection and analysis, communicating with collaborators and contract research organizations and planning tasks for upcoming work. Dr. Powell’s role allows him to extend his tenure in science outside an academic setting while aligning with his passion for research and advancement.
Before joining Mimetic Medicines, Dr. Powell spent five years as a postdoctoral researcher at Boston Children’s Hospital from 2021 to 2025. During this time, he honed his skills in neuropharmacology and contributed to groundbreaking research in the development of non-opioid pain treatments. Before his postdoctoral work, Dr. Powell was a graduate research assistant in the pharmacology and toxicology department at the University at Buffalo in Buffalo, New York, between 2016 and 2021. His academic journey began as a lead science instructor at MedicalSTEP within the University at Buffalo from 2014 to 2017.
Dr. Powell’s educational background laid a strong foundation for his career achievements. Studying at the University of Buffalo, he acquired a Bachelor of Science in pharmacology and toxicology and a Bachelor of Arts in chemistry in 2016, followed by a Doctor of Philosophy in pharmacology and toxicology in 2021. His academic excellence was recognized through awards such as the Dean’s Award for Excellence in Thesis Research and the Excellence Award in the Study of Chemistry. Additionally, Dr. Powell holds certifications in radiation safety from Environmental Health and Safety and animal care and use in laboratory settings from the Institutional Animal Care and Use Committee.
A member of several esteemed organizations, Dr. Powell is affiliated with the Society for Neuroscience and the International Association for the Study of Pain. He distinguishes himself through his exceptional aptitude and comprehensive knowledge of his discipline. His ability to approach complex problems with fresh perspectives sets him apart from others in his field. Despite being relatively early in his career compared to many other chief scientific officers, Dr. Powell bridges the gap between experienced professionals nearing retirement and the vibrant realm of academic science.
Dr. Powell attributes his success to persistence, a quality he views as essential to achieving one’s goals. He believes that dedication and perseverance are more challenging to develop than skills acquired through formal education. This mindset has been instrumental in Dr. Powell’s journey from Savannah, Georgia, to Buffalo, where he has maintained strong connections with friends while exploring new horizons.
Offering valuable advice to those entering the industry, Dr. Powell notes that setbacks are inevitable but should not deter progress. By adopting resilience and viewing challenges as small hurdles on the path to greater achievements, individuals can overcome obstacles and succeed beyond their expectations.
Eager for the future of his career, Dr. Powell aims to achieve clinical efficacy with the molecule he has been developing at Mimetic Medicines. Ultimately, he envisions expanding its application to meet growing demands for effective therapies.
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