The agreement will also see HSS supply heating, cooling and lifting equipment.
HSS is one of three selected suppliers for these services.
HSS chief executive Chris Davies said: “We are delighted to be working with Kier on this new agreement. The company is a significant new addition to our account base and we are working with them to fully understand their hire requirements and are committed to responding with a transparent, partnership solution. Together we represent best-of-breed like-minded organisations and I am confident our collaboration will be mutually beneficial.”