Mark has been married to his wife Lisa for 25 years. Together they have two children, Hannah who is 21 and Ethan who is 19. The family loves the great outdoors and spends time together hiking and exploring the National Parks such as Yellowstone, Bryce and Zion.

Mark began working for Union Pacific Railroad in 1995 as a Switchman, Brakeman and Conductor in the Omaha, NE area. These duties consisted of switching in rail yards, both flat switching and in hump yards, working on local trains, setting-out and picking-up cars at stations on the main line and as a through freight conductor on the mainline. In 2000 Mark received a promotion to Locomotive Engineer. He ran trains on the mainline between Cheyenne, WY and North Platte, NE and ran switch locomotives in the Cheyenne, WY rail yard. In 2007 Mark received promotion to Manger Track Image Recorder / Event Recorder Center. In this position Mark reviewed and analyzed thousands of Event Recorders for engineer performance as well as for critical incidents and derailments. Reviewed and analyzed thousands of Track Image Recorder (TIR) videos for critical and noncritical incidents. Designated as a 30(B)(6) expert witness and testified over forty times on behalf of Union Pacific Railroad. Created and facilitate Event Recorder training for field managers. Conceived and helped to create the Video Vault system and field TIR download system.