An alumnus of Pennsylvania's Slippery Rock State University, David Jarjisian obtained a bachelor's degree in business administration and economics from the school. While enrolled, he also served as an officer in the Lambda Chi Alpha fraternity and as an assistant accountant for the college union. He completed an internship at Butler County Hospital and, upon graduating, began his career as an assistant administrator at Reber Freil Company. During his two years with the Pennsylvania-based company, David Jarjisian managed the National Housewares Show which, at the time, was the largest convention in the US.

From there, David Jarjisian joined Computerland, where he went on to serve four years as a sales manager responsible for selling and programming IBM and Apple PCs to corporate accounts. He later joined Jackson-Cross Company as senior vice president and served in this capacity until 2010, during which time he facilitated the leasing and sale of office buildings in Philadelphia's Center City. Outside of his professional pursuits, he enjoys gardening, fly fishing, and building furniture.