Current lab members



Chris Geyer, Ph.D. (PI)   Chris grew up in central VA and completed a B.S. in Biology at Virginia Tech. After graduation, he worked for four years for two small biotechnology companies (PPL Therapeutics and CropTech Biosciences). He left SW VA to pursue a Ph.D. at The University of Texas Health Science Center at San Antonio in the laboratory of John McCarrey. He then joined Mitch Eddy’s laboratory as a postdoctoral fellow at the National Institute of Environmental Health Sciences (NIEHS) in Research Triangle Park, NC. In 2010, he started his lab in the Department of Anatomy & Cell Biology at the Brody School of Medicine at East Carolina University.   Email:  geyerc@ecu.edu

Chris Geyer, Ph.D. (PI)

Chris grew up in central VA and completed a B.S. in Biology at Virginia Tech. After graduation, he worked for four years for two small biotechnology companies (PPL Therapeutics and CropTech Biosciences). He left SW VA to pursue a Ph.D. at The University of Texas Health Science Center at San Antonio in the laboratory of John McCarrey. He then joined Mitch Eddy’s laboratory as a postdoctoral fellow at the National Institute of Environmental Health Sciences (NIEHS) in Research Triangle Park, NC. In 2010, he started his lab in the Department of Anatomy & Cell Biology at the Brody School of Medicine at East Carolina University.

Email: geyerc@ecu.edu

Bryan Niedenberger (Research Technician)   Bryan Niedenberger grew up in Yorktown, Virginia. Before joining the Geyer lab as a Research Technician, Bryan received a bachelor’s degree from High Point University and a Master’s degree from Appalalchian State.   Email:  niedenbergerb@ecu.edu

Bryan Niedenberger (Research Technician)

Bryan Niedenberger grew up in Yorktown, Virginia. Before joining the Geyer lab as a Research Technician, Bryan received a bachelor’s degree from High Point University and a Master’s degree from Appalalchian State.

Email: niedenbergerb@ecu.edu

Benjamin Hale, Ph.D. (Postdoctoral Scholar)   Ben grew up in Rolla, MO and received his PhD from Iowa State University working on oocyte maturation in pigs. He then worked at Washington State University as a Postdoctoral Researcher to study factors contributing to chromosomal mis-segregation in the early embryo. While at WSU, Ben became interested in the regulation of spermatogonial cell fate decisions. This led to Ben joining the Geyer lab to work on spermatogenesis in the neonatal mouse testis. His hobbies include hiking and playing guitar.   Email:  halebe18@ecu.edu

Benjamin Hale, Ph.D. (Postdoctoral Scholar)

Ben grew up in Rolla, MO and received his PhD from Iowa State University working on oocyte maturation in pigs. He then worked at Washington State University as a Postdoctoral Researcher to study factors contributing to chromosomal mis-segregation in the early embryo. While at WSU, Ben became interested in the regulation of spermatogonial cell fate decisions. This led to Ben joining the Geyer lab to work on spermatogenesis in the neonatal mouse testis. His hobbies include hiking and playing guitar.

Email: halebe18@ecu.edu

Taylor Johnson (Ph.D. student)   A Florida native, Taylor graduated from Southeastern University with a B.S. in Biology/Pre-Med. At Southeastern, he was involved in student life, lifeguarded, and ran cross-country. Upon graduating, Taylor interned for GTD Scientific and taught high school science courses. He then attended the University of Central Florida (UCF) and earned Masters Degrees in Biotechnology and in Biomedical Sciences. Taylor taught extensively at UCF and conducted research in the Metabolic and Cardiovascular division under Dr. Dinender Singla, focusing on cancer drug-induced cardiac and skeletal muscle remodeling. He is interested in researching metabolic regulators of spermatogenesis and relationships between diets and metabolic diseases with male reproductive health. He enjoys volunteering and anything sports-related.   Email:  johnsontayl18@students.ecu.edu

Taylor Johnson (Ph.D. student)

A Florida native, Taylor graduated from Southeastern University with a B.S. in Biology/Pre-Med. At Southeastern, he was involved in student life, lifeguarded, and ran cross-country. Upon graduating, Taylor interned for GTD Scientific and taught high school science courses. He then attended the University of Central Florida (UCF) and earned Masters Degrees in Biotechnology and in Biomedical Sciences. Taylor taught extensively at UCF and conducted research in the Metabolic and Cardiovascular division under Dr. Dinender Singla, focusing on cancer drug-induced cardiac and skeletal muscle remodeling. He is interested in researching metabolic regulators of spermatogenesis and relationships between diets and metabolic diseases with male reproductive health. He enjoys volunteering and anything sports-related.

Email: johnsontayl18@students.ecu.edu

Oleksandr "Sasha" Kirsanov (Ph.D. student)   Sasha was born and raised in Simferopol, Ukraine. He gained an interest in science at theMedical-Biological Lyceum. He moved to the United States when he was 16 to attend Chowan University, where he graduated with a B.S. in Biology. At Chowan, he was a dual collegiate athlete, playing tennis and running cross country. Sasha recently completed the Biomedical Sciences M.S. program at ECU’s Brody School of Medicine and is now a Ph.D. student in the Geyer laboratory. His hobbies include tennis, collecting mugs, and spending time with friends.   Email:  kirsanovo16@students.ecu.edu

Oleksandr "Sasha" Kirsanov (Ph.D. student)

Sasha was born and raised in Simferopol, Ukraine. He gained an interest in science at theMedical-Biological Lyceum. He moved to the United States when he was 16 to attend Chowan University, where he graduated with a B.S. in Biology. At Chowan, he was a dual collegiate athlete, playing tennis and running cross country. Sasha recently completed the Biomedical Sciences M.S. program at ECU’s Brody School of Medicine and is now a Ph.D. student in the Geyer laboratory. His hobbies include tennis, collecting mugs, and spending time with friends.

Email: kirsanovo16@students.ecu.edu

Jamie Chamberlin (Undergraduate student, Biochemistry)   Jamie was raised in Winterville, NC and graduated from the North Carolina School of Science and Math in 2017. She chose to attend ECU after receiving the EC Scholar award and Early Assurance to Brody School of Medicine. Jamie is double-majoring in Biochemistry and Biology in hopes of one day getting an MD. Outside of academia, she enjoys playing intramural beach volleyball, hitting the gym, traveling, and spending as much time outside as possible.

Jamie Chamberlin (Undergraduate student, Biochemistry)

Jamie was raised in Winterville, NC and graduated from the North Carolina School of Science and Math in 2017. She chose to attend ECU after receiving the EC Scholar award and Early Assurance to Brody School of Medicine. Jamie is double-majoring in Biochemistry and Biology in hopes of one day getting an MD. Outside of academia, she enjoys playing intramural beach volleyball, hitting the gym, traveling, and spending as much time outside as possible.

Taylor Malachowski (Undergraduate student, Biology)   Taylor grew up in Concord, NC and graduated from Mount Pleasant High School in 2017. She chose to attend ECU after receiving admission into the Honors College as an EC Scholar finalist. Taylor is pursuing a B.S in Biology and a B.A in Chemistry. Her future plans include getting an MD or going into a Ph.D. program in genetics. Outside of academia, she enjoys going to the gym, playing intramural flag football, and attending numerous theater productions.

Taylor Malachowski (Undergraduate student, Biology)

Taylor grew up in Concord, NC and graduated from Mount Pleasant High School in 2017. She chose to attend ECU after receiving admission into the Honors College as an EC Scholar finalist. Taylor is pursuing a B.S in Biology and a B.A in Chemistry. Her future plans include getting an MD or going into a Ph.D. program in genetics. Outside of academia, she enjoys going to the gym, playing intramural flag football, and attending numerous theater productions.


Former lab members

Dr. Nicholas “Nick” Serra (Ph.D. student 2014-2019), Postdoctoral Fellow in Dr. Meera Sundaram’s laboratory at the Perelman School of Medicine at the University of Pennsylvania

Dr. Ellen (formerly Velte) Harrington (Ph.D. student, 2013-2018), Recruitment Consultant, Hays Recruiting Experts Worldwide

Kenneth "Trey" Cook (ECU undergraduate researcher, 2014-2017), Veterinary Student at North Carolina State University, class of 2021

Dr. Jonathan “Jon” Busada (Ph.D. student, 2011-2015), Postdoctoral Fellow in Dr. John Cidlowski's lab, Molecular Endocrinology Group, NIEHS

Evelyn Kaye (ECU undergraduate researcher, 2012-2014)

Kate McPherson (ECU undergraduate researcher, 2013), Student at University of North Carolina at Chapel Hill School of Dental Medicine, class of 2020

Dr. Vesna Chappell (postdoctoral scholar, 2010-2013), Biologist in Sue Fenton's lab, Reproductive Endocrinology Group, NIEHS