The Team

Meet the members of the team who have made the Stephan Challenge possible.

  • Lincoln Baker, Project Manager
  • David Chen, MD, Medical Director of the Spinal Cord Injury Rehabilitation Program at the Rehabilitation Institute of Chicago
  • Susan Keeshin, MD, Medical Director of Day Rehabilitation at the Rehabilitation Institute of Chicago
  • Santiago Toledo, MD, Medical Director of the Orthopedic Rehabilitation Program at the Rehabilitation Institute of Chicago
  • George Hornby, PhD, PT, Research Scientist/Physical Therapist at the Rehabilitation Institute of Chicago
  • Arun Jayaraman, PhD, Research Scientist/Physical Therapist at the Rehabilitation Institute of Chicago
  • Heidi Roth, Physical Therapist at the Rehabilitation Institute of Chicago
  • Mark Fischer, Occupational Therapist at the Rehabilitation Institute of Chicago
  • Jason Convisor, PhD, Exercise Physiologist
  • John Sitt, Fitness Revolution
  • Shawn True, Activation Fitness
  • Judd Paschen, Fit for Life
  • Robbie Ventura, Vision Quest
  • Hal Honeymen, Creative Mobility
  • Courtney Riley, Massage Therapist
  • Maria Estonilo, Personal Aid


Lincoln Baker, Project Manager
Mark will be joined in his challenge by Lincoln Baker, Project Manager of the Stephan Challenge. As an accomplished adventure travel guide with more than 20 years’ experience, Lincoln is expertly creating Mark’s route across the country and coordinating the logistics for every step of ride.

Lincoln felt an immediate connection to Mark when they met. Not only are they both Iron Man triathletes who love the outdoors—but they both thrive on physical activity. As he puts it, “This project resonates so strongly with me because I realize how much the outdoors and adventure feeds Mark’s spirit, and defines who he is.”

Lincoln’s goal in managing this journey is to make the journey a feasible reality by planning each day of their travel, fundraising, driving the support van—and, of course, riding alongside Mark as much as possible.

Passionate for the outdoors since his childhood, Lincoln’s love for adventure travel has led him to guide trips across the world, from Montana and Alaska to Costa Rica and New Zealand. He also works on adapting outdoor gear for disabled adults.