He had also served as Chairman of the Board of Trustees of the International Union of Operating Engineers in Washington, D.C.[2] In May 1953, Giblin was elected to the Newark Charter Study Commission, which recommended a change to the mayor-council form of government.
[1] The U.S. Supreme Court decision in Reynolds v. Sims (more commonly known as One Man, One Vote), required redistricting by state legislatures for congressional districts to keep represented populations equal, as well as requiring both houses of state legislatures to have districts drawn that contained roughly equal populations, and to perform redistricting when needed.
[7] Giblin and his three running mates defeated four Republicans, including the incumbent, Senate Minority Leader C. Robert Sarcone.
New Jersey held a constitutional convention in 1966 to address reapportionment issues created by the One Man, One Vote decision.
He also served as Clerk to the Essex County Jury Commission, and a member of The New Jersey State Board of Mediation.