Sisk Group is a construction and property company founded in Cork, Ireland in 1859 with operations in Ireland, United Kingdom, Belgium, Poland, Sweden and the Middle East.

After an apprenticeship as a plasterer and at the age of 22, John Sisk set up the construction business in 1859.

[1] In April 2019, Sisk was removed from the UK Government's Prompt Payment Code for failing to pay suppliers on time.

[2] It was reinstated around 10 months later.

[3] Major projects involving the company include: