Kevin Kooistra, a local historian and director of the Western Heritage Center, unexpectedly died over the weekend, Mayor Bill Cole said Monday
Cole confirmed Kooistra's death at the Monday Billings City Council meeting, calling him an "incredible, incredible community asset."
"It is truly a community that will miss Kevin," Cole said.
Kooistra died of a heart attack, according to Cole.
Kooistra has worked at the museum as community historian and director since 1996, according to his LinkedIn profile.