Mourners are gathering at St Edmund's Church in Walesby, Notts for the funeral of John Stollery.
The church only holds 100 and many more are expected to listen to the service outside.
There will be a guard of honour from veterans of the Parachute Association. Mr Stollery served with 2 Para Regiment before becoming a social worker.
John Stollery was one of 38 victims killed in the attack on June 26.
He had worked at Nottinghamshire County Council for 33 years and had worked with children in care for the last 16 years.
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