Employees of Nebraska Machinery, 930 W. O St., called 911 after finding an unresponsive coworker at the bottom of the stairs at 9:16 a.m. Monday, Lincoln police said.
Police identified the man Monday night as Barry A. Stutzman, 44, of Seward.
Stutzman's coworkers performed CPR until Lincoln Fire & Rescue arrived. He was taken to a hospital and pronounced dead, Officer Katie Flood said.
An autopsy has been ordered to determine what exactly caused Stutzman's death, but investigators do not suspect foul play at this time, Capt. Bob Farber said.