Joshua Modell

Principal Investigator

Josh got his PhD from MIT in the lab of Michael Laub and did his postdoctoral work at Rockefeller University with Luciano Marraffini. Outside of the lab, Josh enjoys cooking, eating, ball sports, and constantly filling his rear bike wheel with air. Josh wonders whether there is a hole or if that’s simply what it’s like to be a bike commuter, riding and pumping, riding and pumping. Josh claims to be training for a half-marathon, but some question his dedication, most of all, his wife Cleo. Cleo mentioned that there is a 5k on the same day as the half-marathon, and Josh felt patronized, which is exactly what Cleo wanted. Now, everyone’s watching to see what he will do…


Leo Graeff

Undergraduate Researcher

Leo is a senior studying Molecular and Cellular Biology at JHU. He joined the lab in February of 2019 and loves the hands-on work, which he finds much more engaging than reading massive textbooks. Outside of lab, Leo is the Head Personal Trainer at the JHU Rec Center, a Presiding Official on the JHU Academic Ethics Board, an amateur Model United Nations Participant, avid snowboarder, ragingly mediocre squash player, and massive soccer fan. Inspired by his fearless PI, he is also training for the (perhaps too) lofty goal of running his first ever marathon in Miami, which he registered for rather impulsively.

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Nick Keith

BCMB PhD Student

Nick received his BS in Biology from the University of North Carolina - Chapel Hill. Outside of lab, he devotes the majority of his time to planning his next backpacking adventure (both the hiking and world-traveling types). Since he’ll never actually be able to find the money or time for those trips, he instead spends his free time playing the banjo and other instruments, making home renovations, and trying to clicker train his stubborn cat. If all goes as planned, he recommends following his newly-trained adventure cat’s Instagram influencer account so he can help his girlfriend pay her medical school tuition.


Binh Nguyen

Research Technologist

Binh is a research technologist helping with maintenance of the lab and assisting lab members on projects, though one could say that her main job is to prevent the lab from burning down amidst the frenzy. Binh obtained a BA in Mathematics and minor in Biology from Hamilton College (NY), and an MS in Biotechnology from Johns Hopkins University. Among her coursework at Hopkins, she found cancer immunotherapy and CRISPR-Cas gene editing techniques particularly intriguing, the latter of which prompted her to join the lab to learn more about the basic science behind it. When not trying to perfect her pipetting and streaking techniques, Binh can be found shopping for food, cooking food, eating food, looking up food recipes, watching food TV shows, or otherwise thinking about food.


Teja Pammi

Research Technologist

Teja joined the Modell Lab as a research technologist after receiving her BA in Behavioral Neuroscience from Lehigh University. When she is not in lab smelling bacteria and pipetting away, she can be found chasing autumnal colors in New England, reading books under a pile of fuzzy blankets, playing Sam Smith on the piano, or drinking copious amounts of tea. Don't ask her what her future plans are because she doesn't know yet... but she is happy to talk about all the mysteries of life, science, love, and more any day!


Marie Stoltzfus

BCMB PhD Candidate

Marie received her BS in molecular biology from Millersville University. When she isn’t pipetting or watching bacteria battle phage under the microscope, she enjoys running and biking around Baltimore, cooking (mostly) vegetarian food, enthusing over science with elementary school students, and playing the cello. She has backpacked alone through foreign countries and jumped out of a plane at 15,000 feet, but catching a waiter’s attention still makes her nervous every time.


Rachael Workman

BCMB PhD Candidate

Rachael received her BS and MS in Biology from WV and Portland State Universities. When not in lab grappling with the mysteries of microbial genetics, she can be found hugging her three dogs, cat and husband, playing gaelic sports, gardening, playing euphonium, or laying on the couch drinking whiskey and thinking she does too many things. She is the lab's resident expert on Bachelor Nation and always prefers to be wearing hiking boots because you just never know.


Johns Hopkins School of Medicine

Department of Molecular Biology and Genetics

©2019 by Modell Lab

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