In 1906, J. V. Jamison, Sr. and two partners founded the Jones Cold Store Door Company. He soon bought his partners' interest. Over five decades, he and his son, J. V. Jamison, Jr. grew the company (renamed the Jamison Cold Storage Door Company) through expanding markets and the purchase of competitors. Jamison Door became one of Hagerstown's largest businesses, manufacturing over a million doors. In 1942, leadership passed to a third generation when the founder's grandson, John III, was elected president of the company.