Main contractor Balfour Beatty resumed work on Monday morning after the HSE and police concluded their enquiries.
Balfour said: “There was a fatality at the former Olympic Stadium site yesterday morning.
“We worked fully with the police whilst they carried out their enquiries which concluded yesterday. They are treating the death as non-suspicious.
“The HSE has confirmed the fatality is not being treated as a workplace incident.
“Work resumed on site this morning.
“Our thoughts remain with the individual’s family, friends and colleagues.”