Lotz and Kier
1928 Jorgen Lotz and Olaf Kier, formed Lotz and Kier, a construction business. They were pioneers of reinforced concrete design and construction. Their first contract was for to use reinforce concrete in a bridge in Bath (which is still in service in 2021 and bears the Lotz and Kier plaque - presumably this was Cleveland Bridge).
1932 J. L. Kier and Co was formed to take over the civil engineering and building contractor business that had been established by Olaf Kier.
Sources of Information
-  Wikipedia