Edward J. King began his career with a background in accounting and business, complemented by early work experience in a bowling alley. He served in the United States Navy before transitioning to a professional football career. King later held various roles at the Massachusetts Port Authority, culminating in his position as executive director. Following his tenure at Massport, he became president of a regional chamber of commerce, where he focused on lobbying and coordinating energy research. King's leadership experience and business acumen were foundational to his subsequent political career, where he served as governor, implementing fiscal policies and infrastructure projects.

Edward J. King's political identity is marked by a surprising blend of fiscal conservatism with a socially progressive stance on issues like capital punishment and the drinking age. His tenure as governor saw a freeze on property taxes and reduced social spending, yet he also championed mandatory minimum sentences and supported the death penalty. King's career reveals a strategic alignment with opposing factions on environmental regulations, suggesting a calculated approach to balancing regional industrial interests with broader policy goals.