Mark Nebel
Mark Nebel is a former manager of the geosciences program at the Grand Canyon National Park, where he dedicated 15 years to overseeing the protection of its geological and paleontological resources. After becoming increasingly frustrated with the Trump administration's policies that hindered environmental protections and staff operations, Nebel made the difficult decision to resign early to safeguard his health and well-being.
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Recent news mentions
Mark Nebel, who until recently retiring, oversaw water monitoring at Grand Canyon, worries that ash, sediment and chemical fire retardant may seep through the ground and into the aquifer that feeds the springs.
An explosive Grand Canyon wildfire brings terror, loss and tough questions: ‘It came like a freight train’ | Arizona
United Kingdom· 2025-07-20
Mark Nebel, a longtime manager at the Grand Canyon, expressed his demoralization over the harm being done to national parks.
Parks, libraries, museums: here’s why Trump is attacking America’s best-loved institutions | Margaret SullivanUnited Kingdom· 2025-06-03
Mark Nebel resigned from his position at the National Park Service due to frustrations under the Trump administration.
Turmoil, resignations and ‘psychological warfare’: how Trump is crippling US national parks | Trump administrationUnited Kingdom· 2025-05-28
