John R. Callen has 30+ Years in the area of medical rehabilitation services. John Callen is currently the CEO / Managing Partner of MedRehab Alliance, LLC and CEO / Managing Partner of Joint&Neuro Rehab Associates, LLC.
Website: https://www.linkedin.com/in/john-callen-jd-mj-mba-ms-ccc-618214a1
John Callen 