Born on June 15, 1936, he was the son of Josef Koncer and Mary Rehak.
John was employed with the chain grocery store A&P for thirty eight years before he retired. He became a stone mason and worked on historical places in and around the Martinsburg area.
John was a lifetime member of the National Rifle Association; he was an avid hunter and enjoyed traveling.
In addition to his parents, he was preceded in death by his two brothers: Joseph and Frank Koncer; a sister, Libby Crawford; and niece, Diane.
John is survived by his long-time companion of twenty years, Lena Poole; one nephew, Nick Crawford; a niece, Mary Burkett; and two cousins: Theresa Duncan and Carol Norris.
Friends will be received on Friday, September 20th from 10am until the time of the memorial service at 11am at Rosedale Funeral Home.