The victim of a suicide attack in Kabul had been living with his fiancee in County Londonderry, Northern Ireland.
Mr Chase's fiancee Norma McDowell was being comforted by family and friends after learning of the news.
It is understood the couple lived together with two children in the Drumachose Park area of the town.
The ex-Cheshire Regiment soldier had worked as a nightclub doorman in Limavady before travelling to Kabul to work in the security industry.
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Police said the "active shooter", reportedly a lawyer, had since been shot by officers and they were not seeking any other suspects.