Democrat Robert J. Karabinchak was appointed to the New Jersey General Assembly in May 2016 and re-elected in 2017. Prior to representing the 18th Legislative District, he served the residents of Edison for 16 years, including eight as a member of the Township Council and eight prior years on the Zoning Board of Adjustment. Karabinchak served multiple terms as Council President; a member of the council's Finance, Open Space and Master Plan committees, and is a former Middlesex County Utilities Authority commissioner.

Karabinchak is the President of Tri-Form Construction, a contracting firm based in Metuchen. He has been honored for his long-time commitment to promoting affordable housing. He is also an outspoken advocate for statewide property tax reform. He has publicly promoted changes to New Jersey's commercial tax appeal process to prevent it from shifting a greater financial burden onto homeowners.

He has been honored by the New Jersey Chapter of the American Public Works Association for promoting essential infrastructure improvements throughout Edison.

A resident and small business owner in the Edison/Metuchen area for over 30 years, Karabinchak and his wife Linda, are the parents of three adult children, Steven, Brian and Lori.

He represents the 18th Legislative District, which includes the Middlesex County municipalities of East Brunswick, Edison, Helmetta, Highland Park, Metuchen, South Plainfield, and South River.