Lori joined Steamboat Orthopaedic Associates, P.C. in August, 2006. She fulfilled her undergraduate degree in Chemistry with the United States Military Academy at West Point. She completed her medical degree at Dartmouth Medical School in Hanover, New Hampshire in 1991. She served a general surgery internship at Fitzsimons Army Medical Center in Aurora, Colorado. She later completed her residency program in orthopaedic surgery at Madigan Army Medical Center in Tacoma, Washington.

Dr. Harrington became a fellow of the American Academy of Orthopaedic Surgeons in 2004. She was awarded a Meritorious Service Medal, two Army Commendation Medals and an Army Achievement Medal during her service from 1991 to 2004. She was a Barnard Research Competition winner in March 1995 and a Hugh Mahon Lectureship winner in May 1995 for "Development of an Infection Resistant, Tibially Implanted Percutaneous Limb Prosthetic Device", Harrington, Lisecki, Cocoran, and Sherman. Lori’s additional research work include "Accurancy of Military Electronic Databases for Research", Harrington, Pace, and Place; and "Distal Tibial Growth Arrest in Idiopathic Talipes Equinovarus", Harrington and Lester.

Lori is married to Dr. Brian Harrington, and has four children - Taylor, Charlie, Avery and Kendall.