TULSA, Oklahoma - Editor's note:  An earlier version of this story reported that the incident took place in Iraq, but it actually took place in Afghanistan.  News On 6 regrets the error.

A Tulsa man working in Afghanistan as an Army contractor died Saturday of an apparent heart attack.

Robert McCullough, 54, was working for DynCorp upgrading systems to military vehicles in Afghanistan.

McCullough had no previous military experience and was not involved in combat operations.

McCullough was the co-founder of Tulsa Hope Academy, a faith based non-profit that helps urban children reach their educational goals.

Robert McCullough leaves behind a wife, five children and one grandchild.

Memorial Services were held at Kandahar Airbase in Afghanistan on Wednesday. A memorial service will be held in Tulsa at Victory Christian Center in the Chapel at 11 a.m. on Saturday, December 3, 2011.