US: Summit Materials has appointed Karl H Watson Jr as its chief operating officer and executive vice president. He suceeds Douglas C Rauh.

Watson holds over 25 years of experience in the construction materials industry. In 2017, he served as President, Cement & Southwest Ready Mix at Martin Marietta Materials. Prior to joining Martin Marietta, Watson served in various leadership positions at Cemex, including President, Cemex USA. Prior to Cemex's acquisition of Rinker Group, Watson held various executive positions at Rinker in both the US and Australia.

Watson is currently on the board of directors of the Texas Aggregates & Concrete Association and on the executive committee of the Portland Cement Association where he served as the vice chairman from 2013 to 2015. He is a past chairman of the National Ready Mix Concrete Association and the Florida Concrete and Products Association and was on the board of directors of the National Stone, Sand and Gravel Association from 2007 to 2011. Watson has a Bachelor's of Science degree in Business Administration from Palm Beach Atlantic University.