Civilian contractor Liron Yitzhak, 30, who was injured by Hamas mortar fire in Gaza on Monday, succumbed to his wounds on Wednesday.
He is survived by his parents, a brother, a sister and his fiancée Almog, to whom he was supposed to be married in two weeks.
"We share in the sorrow of the family of Liron Yitzhak, an employee of the contracting company who was severely injured during operational activity in the Gaza Strip and succumbed to his injuries," the Defense Ministry said in a statement.
"Yitzhak performed tasks on behalf of a company employed by the ministry, assisting the IDF forces operating in Gaza, and was injured by mortar fire."
The IDF reported that two soldiers from the elite engineering unit Yahalom were also severely wounded in the same incident, and six others suffered moderate wounds. In addition, two other Defense Ministry contractors were lightly injured in the incident.