Christopher Mark

As of 2025, Christopher Mark is the current principal roof control specialist for the U.S. Mine Safety and Health Administration (MSHA), an agency of the Department of Labor. He has been in this role since 2010, most notably achieving a landmark zero fatalities attributed to roof falls in 2016—the first year on record without such casualties. He previously worked for 23 years as the leader of the ground control research program at the National Institute for Occupational Safety and Health. Provided by Wikipedia