Andre Dight, 47, of Overland Park, died when his SUV left the roadway on U.S. 69 and crashed head-on into a bridge pillar at 287th Street.
Dight managed the therapeutic garden and animal therapy center for the Paola-based program for children and adults with disabilities.
Dight's wife, Gianna Gariglietti, is Lakemary's president and CEO.
"It is with heavy hearts that we confirm the passing of our beloved Andre Dight, Lakemary Ranch Manager and husband to our President/CEO Gianna Gariglietti," the Lakemary Center said in a post on its Facebook page Monday.
"Please keep Andre's family and the entire Lakemary community in your thoughts and prayers."
Lakemary calls itself a place where children with intellectual and developmental disabilities "learn and heal."
Since 1969, its website says, the campus helped "some of society's most forgotten children find hope, dignity, and a real opportunity for a life with meaning."
Garigliette became CEO in 2015 and Dight had been the ranch manager since July 2016, according to his LinkedIn web page.
Dight's KIA Borrego was traveling north on U.S. 69 about 2:30 p.m. when the SUV apparently left the roadway onto the grass shoulder, the Miami County Sheriff's Office reported.
The vehicle was on fire in the east ditch under 287th Street when emergency crews arrived. Dight was pronounced dead at the scene.