Mr. Quimby's specialties include railroad and rapid transit accident investigation, particularly rolling equipment and motive power, event recordings, track, operations, train handling, and human performance. He retired from the National Transportation Safety Board after 22 years as an Investigator-in-Charge in 2007 during which time he participated in 57 major accident investigations, 32 field accident investigations, 10 public hearings, 16 depositions, and 6 special studies. He wrote 11 major accident reports, 8 field accident reports, and personally conducted 10 sworn depositions. Mr. Quimby was responsible for over 157 adopted NTSB safety recommendations in all facets of rail transportation. Mr. Quimby previously worked for the Burlington Northern Railroad from 1979 until 1984 as a mechanical department manager. After his NTSB retirement, he became Assistant Vice President of Operations, Planning and Analysis for Rail Sciences Inc. from 2007 until 2008.