ASSOCIATE PROFESSOR & GRADUATE OFFICER | DEPARTMENT OF BRAIN & COGNITIVE SCIENCES                                      

INVESTIGATOR | MCGOVERN INSTITUTE FOR BRAIN RESEARCH  

Mark joined the faculty at MIT in 2015 and was tenured in 2023.  He became Graduate Officer in 2021. He received his B.A. in Biology from Reed College in Portland, Oregon and his Ph.D. from the University of Texas at Austin.  Prior to joining MIT, he was a postdoctoral researcher at the Howard Hughes Medical Institute’s Janelia Research Campus in Ashburn VA.

46-6143A | 617.324.6989 | harnett at mit dot edu

Research Scientists & Postdocs

  • Courtney Yaeger (She/Her), Ph.D | Research Scientist

    Courtney joined the lab in January of 2019. She received her B.S. in Neuroscience (Independent Plan of Study) from the University of Illinois and her Ph.D. in Neuroscience from the University of California, Los Angeles. Courtney is an LSRF fellow.

    yaeger at mit dot edu

  • Chunyan Wu (She/Her), Ph.D | Postdoctoral Associate

    Chunyan joined the lab in October of 2021. She received her B.S. in Bioengineering from the Hefei University of Technology in China, her M.Eng. in Biomedical Engineering and her Ph.D. in Biomedical Sciences from Cornell University.

    cw674 at mit dot edu

  • Zhaoran (Joanne) Zhang (She/Her) Ph.D. | Postdoctoral Associate

    Joanne joined the lab in April 2024. She received her B.S. in Biology from Sichuan University and her Ph.D. in Neuroscience from University of California, Riverside.

    Zhaoran at mit dot edu

  • Cynthia Rais (She/Her), Ph.D. | Postdoctoral Fellow

    Cynthia joined the lab in July of 2024. She received her B.S. in Biology and Master of Neuroscience from the University of Bordeaux, France and her Ph.D. in Neuroscience from the University Medical Center Hamburg-Eppendorf, Germany.

    crais at mit dot edu

  • Raúl Mojica Soto-Albors (He/Him)

    Raul first joined in the lab in June 2017 as part of MSRP, and returned in February 2018 as a Visiting Scholar. He came back to the lab for graduate school from 2020-2025. He received his B.S. in Biology from the University of Puerto Rico at Mayagüez.

    rmojica at mit dot edu

  • Ziyu Liang (She/Her), Ph.D | Postdoctoral Associate

    Ziyu joined the lab in March of 2026. She received her B.S. in Biology, Physiology, and Neurobiology from Peking University in China and her Ph.D in Neuroscience from the University of Southern California.

    ziyu1202 at mit dot edu

Graduate Students

  • Gabriela Rasch (She/Her) | BCS Graduate Student

    Gaby joined the lab in April 2022. she received her B.S. in Biomedical Engineering with a minor in psychology from Florida International University in Miami, FL.

    grasch at mit dot edu

  • Abhiram (Abhi) Iyer (He/Him) | EECS Graduate Student

    Abhi joined MIT as a grad student in 2022 and joined the lab in 2024. He received his B.S. in Computer Engineering from UC San Diego in 2019 and his M.S. in Electrical and Computer Engineering from Carnegie Mellon University in 2021. Abhi is a K. Lisa Yang ICoN Graduate Student Fellow.

    abiyer at mit dot edu

  • Rachel Sava (She/Her) | MEMP Graduate Student

    Rachel joined the lab in July 2025. She received her BSc in Neuroscience at UCL and MSc in Biotechnology at ETH Zurich. She is a Medical Engineering and Medical Physics PhD student at Harvard-MIT HST.

    rasava@MIT.EDU

  • Sydney Campbell (She/Her) | BCS Graduate Student

    Sydney joined the lab in July 2025 and is co-advised by Dr. Brandon Weissbourd. Prior to joining the BCS PhD program, she graduated with a B.S. in Neuroscience, B.A. in Philosophy, and a minor in Biology from Santa Clara University in 2022. She then went on to complete two years of post-baccalaureate research in the lab of Dr. Michael Tri Do at Harvard Medical School and Boston Children's Hospital.

  • Julia Laventhall (she/her) | BCS Graduate Student

    Julia joined MIT as a graduate student in the fall of 2024, then joined the lab in November 2025. She received her BA in Physics and Neuroscience from Barnard College in 2024. Julia was a recipient of the MIT Presidential Graduate Fellowship to fund her first year of graduate school.

Undergraduate Students

  • Ellie Sandholm (She/they) | Summer Undergraduate Research Technician

    Ellie joined the lab in 2026 and is a current student at Wellesley College studying to get their B.A. in Neuroscience.

    ellsand at mit dot edu

Staff

  • Abi (Zilan) Ding (She/her) | Research Technician

    Abi (Zilan) joined the lab in June 2024. She earned her B.A in Neuroscience from Vassar College.

    zilan662 at mit dot edu

  • Ece Erdogan (She/Her) | Research Technician

    Ece joined the lab in June 2025. She earned her B.S. in Neuroscience from Brown University.

    eceer571@mit.edu

  • Ava Hargrave (She/Her) | Research Technician

    Ava joined the lab in June 2026. She earned her B.A. in Neuroscience and Behavior from Barnard College.

    avah04 at mit dot edu

  • Sara Sinasac (She/her) | Research Technician

    Sara joined the lab in June 2026. She earned her B.S. in Neuroscience from Case Western Reserve University.

    ssinasac at mit dot edu

Most Importantly

  • Hilko, Lab Lab

    Hilko joined the lab in 2024.

Alumni

Julia Dzuibek

Graduate Student

2022-2023

Jakob Voigts

Postdoc

2016-2022

Nicholas Miller

Research Technician

2019-2022

Marissa Hansen

Post Baccalaureate

2016-2018

Vincent Tang

Grad Student, 2020-2025

Postdoc, 2025-2026

Mila Halgren

Graduate Student

2020-2025

Claire Duan

Research Technician

2023-2025

Dimitra Vardalaki

Graduate Student

2019-2023

Trang Pham

Research Technician

2021-2024

Marie-Sophie Helene van der Goes

Graduate Student

2016-2022

Lou Beaulieu-Laroche

Graduate Student

2016-2021

Derrick Barnagian

Research Technician

2015-2018

Alexa Breidinger

Lab Administrator

2018-2025

Quique Tolosa

Tech, 2018-2019

Grad Student, 2020-2025

Jaeyoung Yoon

Postdoc

2019-2023

Norma Brown

Research Technician

2018-2022

Lukas Fischer

Postdoc

2015-2022

Mathieu Lafourcade

Postdoctoral Associate

2015-2020

Olga Vieira

Lab Administrator

2015-2018

Valerio Francioni

Postdoc

2020-2025

Gale Gao

Research Technician

2023-2025

Anna Beltramini

Research Technician

2022-2024

Vardhan Dani

Research Scientist

2015-2017

Weizhuo Liu

Research Technician

2024-2026

Undergraduate Alumni

  • Molly Naegle | 2017-2018

  • Friederike Buck | 2016-2018

  • Keith Murray | 2019-2021

  • Liane Xu | 2019-2020

  • Raphi Kang | 2020-2021

  • Helen Yang | 2020-2022

  • Pranav Murugan | 2020-2022

  • Kathleen Esfahany | 2022-2023

  • Brigette Wang | 2020-2022