Group Members

We are looking for new Postdocs to join the team (see openings) !

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Steven Josefowicz, PhD

Principle Investigator

  • Steven Josefowicz is an Assistant Professor in the Department of Pathology and Laboratory Medicine, Division of Experimental Pathology. Steven has appointments in the Immunology and Microbial Pathogenesis (IMP) Program and the Physiology, Biophysics, and Systems Biology (PBSB) Program. After a BA from UC Berkeley and three years as a research tech working in the area of human immunology and HIV at UCSF, Steve conducted his graduate work with Alexander Rudensky at the University of Washington and Memorial Sloan Kettering Cancer Center. His PhD work focused on mechanisms of immune tolerance and the differentiation and function of regulatory T cells-- how our powerful immune systems can so effectively combat pathogens while tolerating our own tissues, food, and commensal microbiota. He then joined the laboratory of C. David Allis at The Rockefeller University to study epigenetic mechanisms underlying cellular differentiation and stimulation events in the immune system. Joining Weill Cornell Medicine in May 2017, ongoing work in his lab combines the fields of epigenetics and immunology to focus on questions of epigenetic regulation of transcription, especially as it pertains to rapid cellular responses, namely immune cell responses to stimulatory cues. The goal is to reveal fundamental epigenetic mechanisms regulating inflammation and their activity in pediatric and adult inflammatory disease.
  • biosketch

Alexia Martinez de Paz, PhD

Postdoctorate Fellow

  • Alexia joined the lab in April, 2018 after completing her PhD thesis at the University of Barcelona, Spain, and a short postdoctoral training at the University of Victoria, Canada. During that time, she was studying different mechanisms of epigenetic regulation, such as DNA and histone methylation, with especial interest in chromatin and transcriptional dynamics of neurons upon receiving activation signals or circadian cues. In the Josefowicz lab, Alexia is studying epigenetic mechanisms and chromatin structural changes controlling transcription in the immune response and their dysregulation in cancer.


Jin Gyu Cheong

IMP Graduate Student

  • Jingyu was born in Seoul, South Korea. He received his B.S Molecular Biotechnology from Konkuk University and M.S, in pharmaceutical bioscience from Seoul National University. He is now a Weill Cornell graduate student investigating epigenetic mechanism in trained immunity.

Andrew Daman

IMP Graduate Student

  • Andrew got his bachelors in Chemistry and Biochemistry from Seattle Pacific University, and got a job working in an cancer immunology lab, where he stayed for three years before deciding to pursue a PhD at Weill Cornell. Andrew joined the Josefowicz lab in 2018 to work on understanding the role of histone modifications in hematopoietic development.

Dughan Ahimovic

IMP Graduate Student

  • Dughan grew up in the beautiful state of New Jersey and went on to receive a B.S. in Biomedical Engineering from Yale University. He then spent two years working in biotech before deciding to attend Weill Cornell’s IMP Program for graduate school. Dughan joined the Josefowicz Lab in June 2019 to study the function of histone modifications in rapid stimulation-induced gene expression and other epigenetically regulated processes in mammalian immunity.

Chenyang Jiang

BCMB Graduate Student

  • Chenyang received her B.S. in biological sciences from Sichuan University and M.S. in pathobiology from University of Connecticut. After graduation, she worked as a research assistant for three years at Ragon Institute of MGH, MIT and Harvard and Brigham and Women’s Hospital to study HIV/AIDS by developing and applying novel genetic and epigenetic tools to characterize viral reservoirs in HIV-1 elite controllers. Chenyang joined the Josefowicz Lab in July 2021 to investigate epigenetic regulation of transcription in rapid stimulation-induced immune cell responses.

Michael Bale

IMP Graduate Student

  • Michael received his B.A's in Chemistry and Physics from the University of Kentucky in 2016 and a M.Sc. in Bioinformatics at Johns Hopkins University in 2020. During his masters, Michael was a post-baccalaureate research fellow at the National Cancer Institute in Frederick, Maryland in the Translational Research Unit of the HIV Dynamics and Replication program where he worked on profiling integration site distributions in children living with HIV as well as intra-participant HIV-1 genetics. Michael joined the Josefowicz lab in July of 2021 to investigate the role of epigenetic regulation in the activation and memory differentiation of T cells.


Ceyda Durmaz

Role: Research Technician, Bioinformatician

Arjun Ravishankar

Role: Postdoctoral Associate


Role: Research Technician, Lab Manager

Former visitors


Gayathri Shibu, Winter 2020-2021