Shane Wilkinson, 33, was employed as a grounds worker at the Conquest Homes building site in Collyweston when he died on September 4, 2014.
The court heard how Wilkinson had been standing next to a deep trench that had been incorrectly excavated by trench digger-driver Wortley.
When an unsecured trench wall collapsed, Wilkinson was completely buried underneath the rubble. Despite the best efforts of fellow workers, he was pronounced dead at the scene after his body was recovered.
Site manager and director of Conquest Homes, Winterton,52, of Collyweston was convicted of gross negligence manslaughter.