Thomas P. Giblin holds a B.A. in political science from Seton Hall University. He began his career in public service by serving in the New Jersey Air National Guard, reaching the rank of Staff Sergeant. Giblin has held various leadership roles in county and state government, including serving on the Essex County Board of County Commissioners and the New Jersey Real Estate Commission. He has also been involved in state-level politics, having served as chairman of the Essex County Democratic Committee and head of the New Jersey Democratic State Committee. Giblin has experience in labor relations, having managed a local chapter of the International Union of Operating Engineers, AFL–CIO.

Thomas P. Giblin's political career is marked by a strategic blend of labor union advocacy and pragmatic governance, evident in his long-standing ties to the International Union of Operating Engineers. His legislative record reveals an unexpected convergence with opposing factions on environmental regulations, hinting at a highly calculated approach to protecting regional industrial interests. Despite his Democratic affiliations, Giblin's nuanced policy stances suggest an ideologically agile politician adept at navigating complex political landscapes.