Before entering the Senate, Girgenti served in the New Jersey General Assembly, the lower house of the New Jersey Legislature, from 1978 to 1990. While in the Assembly, the Senator served as Deputy Majority Leader in 1990, and Assistant Minority Leader from 1986 to 1989. In March 1990, he was chosen by district Democrats to fill the Senate seat left vacant by the death of Frank X. Graves, Jr., and was sworn into the Senate on April 5, 1990. Senator Girgenti served on the Hawthorne Board of Education from 1972 to 1976, serving as its Vice President from 1972 to 1973. Girgenti is a former director of the Passaic County Mental Health Department, to which he was appointed in 1976 and became board president four months later.
Legislative program
Senator Girgenti has sponsored many important pieces of legislation that have become law, including a measure that requires a life sentence of community supervision for certain convicted sexual offenders who have completed their prison terms, and legislation that mandates and provides funding for sprinkler installation in New Jersey college dorms, following the Seton Hall University dormitory fire in 2000. He has also championed the law criminalizing the desecration of human remains, helping families preserve the dignity and respect of their deceased loved ones and has worked to keep criminals from profiting off of the sales of 'murderabilia.' He has also been opposed to the sale of realistic or replica toy guns to children and was a prime sponsor of the law mandating child-proof firearms or 'Smart Guns' be sold in the State. Girgenti was one of the first Senators to call for enhanced fingerprinting requirements for state employees involved with domestic security, following the September 11, 2001 terrorist attacks and has proposed legislation to update and modernize New Jersey's background check laws so that towns and communities can identify potential threats and prevent them from obtaining jobs where they could harm residents. The Senator has also fought to create the State Public Safety Interoperable Communications Coordinating Council, which would allow first responders — police, firefighters and emergency workers — to communicate between agencies on a single assigned radio frequency. Girgenti has also pushed for increased aid to the New Jersey National Guard, helping to enact legislation which increases the base pay of Guard members when on active duty in the State. On January 7, 2010, the Senator, along with several other Democrats representing urban areas, voted against a measure that would have permitted same-sex marriages in New Jersey.