Deputies said they found Swales unconscious on the ground at Grand Canyon National Park Airport, and he later died at a hospital. The other man, whose name hasn't been released, suffered a broken leg.
The men encountered difficulties when approaching the landing area, and they were in free-fall before hitting the ground, authorities said. It's not known how long they were falling. Swales had purchased a package that included a tandem jump from Paragon Skydive, investigators said.
Calls to Paragon Skydive went to a voicemail message saying the company wasn't available Tuesday and its message box was full. The National Transportation Safety Board is investigating and didn't immediately return a call seeking comment about Paragon's safety record.
Coconino County sheriff's officials said in a statement that "there are no indications that the incident is criminal in nature."