A view of the place of worship where the IS attack was conducted. PHOTO:AFP
The court also fined the unidentified Kuwaiti national $30,000, who previously served at the Kuwait municipality.
The former bureaucrat was also convicted of attempting to entice other Kuwaiti nationals to also join the terrorist outfit.
The ruling itself is final and cannot be challenged.
Additionally, Kuwaiti courts sentenced a number of IS members, sympathisers and financiers to various jail terms.
Kuwait arrests 'IS member' over US truck-ramming attack
In December 2016, a Filipina was given a 10-year jail term by a lower court after being found guilty of joining and plotting for IS.
Similarly, in July of last year authorities stated that they had dismantled three IS cells used to plot attacks such as the suicide bombing on an imambargah as well as on an interior ministry target.
In June 2015, a IS suicide bomber killed 26 worshippers belonging to the Shia minority in an imambargah.
The attack was the worst act of terror carried out in the country's history to date.
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