Leadership Staff

Scott L. Delp, Ph.D.
Principal Investigator
Professor of Bioengineering, Mechanical Engineering & Orthopaedic Surgery (by courtesy)
Stanford University

Jennifer L. Hicks, Ph.D.
Associate Director of the NCSRR
OpenSim R&D Manager
Stanford University

Ajay Seth, Ph.D.
Research Associate
OpenSim API Architect
Stanford University

James J. Dunne
OpenSim Research Associate
Stanford University

Ayman Habib, Ph.D.
OpenSim Application Architect
Stanford University

Joy Ku, Ph.D.
Director of Dissemination and Training
Stanford University

OpenSim Developers and Contributors

A large team of people has played a vital role in the development of the OpenSim software package over the years.

Current OpenSim Development Team

  • Scott Delp
  • Chris Dembia
  • James Dunne
  • Ayman Habib
  • Jennifer Hicks
  • Shrinidhi Kowshika Lakshmikanth
  • Carmichael Ong
  • Apoorva Rajagopal
  • Ajay Seth
  • Thomas Uchida


OpenSim Contributors and Past Developers

  • Frank Anderson
  • Allison Arnold
  • Edith Arnold
  • Cindy Au
  • Matt DeMers
  • Tim Dorn
  • Peter Eastman
  • Dominic Farris
  • Lorenzo Flores
  • Saryn Goldberg
  • Eran Guendelman
  • Sam Hamner
  • Katherine Holzbaur
  • Chand John
  • Cassidy Kelly
  • Marjolein van der Krogt
  • Glen Lichtwark
  • Jingjing Liu
  • May Liu
  • Peter Loan
  • Katie Lund
  • Matthew Millard
  • Paul Mitiguy
  • Soha Pouya
  • Apoorva Rajagopal
  • Jeffrey Reinbolt
  • Andreas Scholz
  • Michael Sherman
  • Ian Stavness
  • Katherine Steele
  • Darryl Thelen
  • Jack Wang
  • Kevin Xu



Scientific Advisors

NCSRR has a set of scientific advisors who act as liaisons and advise the center in regards to a given rehabilitation area.

Steven Collins, Ph.D.
Associate Professor of Mechanical Engineering

Carnegie Mellon University
Area of Specialty:  Robotics

Julius Dewald, P.T., Ph.D.
Professor and Chair, Physical Therapy & Human Movement Sciences, Northwestern University
Professor of Biomedical Engineering and Physical Medicine and Rehab, Northwestern University
Area of Specialty:  Motor Recovery following Stroke

Reggie Edgerton, Ph.D.
Distinguished Professor of Integrative Biology and Physiology, Neurobiology and Neurosurgery
Director of Neuromuscular Research Laboratory

University of California, Los Angeles
Area of Specialty:  Spinal Cord Injury

Michael Fredericson, M.D.
Associate Professor and Chief of Physical Medicine and Rehabilitation

Stanford University
Area of Specialty:  Sports Injury

Nicholas Giori, M.D., Ph.D.
Associate Professor of Orthopaedics, Stanford University
Medical Director of the Rehabilitation R&D Center, Palo Alto Veterans Affairs Health Care System
Area of Specialty:  Osteoarthritis

Jill Higginson, Ph.D.
Associate Professor of Mechanical Engineering and Director of the Center for Biomedical Engineering Research
University of Delaware
Area of Specialty:  Stroke Rehabilitation

Richard R. Neptune, Ph.D.
Associate Professor of Mechanical Engineering
University of Texas at Austin
Area of Specialty:  Prosthetics

Katherine Saul, Ph.D.
Associate Professor of Mechanical & Aerospace Engineering
North Carolina State University
Area of Specialty:  Upper Extremity

Michael Schwartz, Ph.D.
Associate Professor of Orthopaedic Surgery, University of Minnesota
Director of Bioengineering Research,  Gillette Children’s Specialty Healthcare
Area of Specialty:  Rehabilitation for Children with Cerebral Palsy

Matthew Smuck, M.D.
Associate Professor of Orthopaedic Surgery, Stanford University
Chief, Physical Medicine and Rehabilitation, Stanford University Medical Center
Area of Specialty:  Spine Disorders

Email Updates

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News & Announcements

NIH supports OpenSim for five more years

Nov 24, 2015

We are excited to announce that the OpenSim project has secured an additional five years of funding through the renewal of our NIH-funded National Center for Simulation in Rehabilitation Research (NCSRR). We are grateful to everyone who provided a letter of support for our renewal application, and we thank all members of the community for contributing to the growth and vibrancy of the project by participating in our forum, attending workshops, teaching with OpenSim, and publishing excellent research.

In the coming years, the NCSRR will continue to support and expand the OpenSim project by enhancing the OpenSim software platform and continuing our Visiting Scholars, Pilot Project, OpenSim Fellows, workshop, and online training programs.

OpenSim highlighted in the Nature Toolbox Blog

Oct 04, 2015

The Nature Toolbox blog highlighted OpenSim in a recent story,
Motion studies: See how they run
. The article included a broader discussion about the contributions of open-source modeling and simulation software for the study of human and animal locomotion. The article talks about the benefits, and drawbacks, of these large-scale software platforms as well as the communities they can create.

OpenSim gets high marks as a multibody system simulator

Aug 03, 2015

A recent study by Luca Tagliapietra and his University of Padua colleagues demonstrates that the OpenSim, which uses Simbody as its multibody dynamics engine, generates highly accurate simulations of mechanical systems. OpenSim was evaluated using the Multi-Body System (MBS) Benchmark, which consists of five systems ranging from a simple pendulum to an over-constrained system of five rods and six rotational joints (Bricard's mechanism).This work (extended abstract ) was presented at the 2015 European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS) Thematic Conference on Multibody Dynamics (see page 1572 of the Proceedings). You can learn more and download the code that implements the benchmarks in OpenSim here.

OpenSim community members earn awards for their research

Mar 13, 2015

Several students have recently been recognized for their work with OpenSim:

Oregon State University undergraduate Jade Montgomery won two awards from the College of Engineering for her research work conducted with Ravi Balasubramanian. Awards included the Undergraduate Researcher of the Year for 2013 and First Place in the poster competition at "Celebrating Undergraduate Excellence", 2013. Jade used OpenSim to study how effective implanted engineering mechanisms are in tendon-transfer surgery.

Florida high school students Christopher Fregly and Brandon Kim took first place in the Physics and Astronomy category at the Alachua Regional Science Fair. Working with NASA, Fregly and Kim used the OpenSim software to predict simple ways that astronauts could modify the standard squat exercise to be more effective at maintaining muscle mass on the International Space Station.