Colin Witham

Colin Witham is an experienced professional with over 25 years in the construction and civil engineering sectors, currently serving as Frameworks Manager at both Holcim UK since March 2025 and Aggregate Industries UK since March 2020. Colin also holds the position of Project Manager at Aggregate Industries US since 2011. Previous roles include Contracts Manager at CK Highway Management from September 2010 to March 2020, Highways Team Leader at Balfour Beatty from March 2009 to September 2010, and Contracts Manager at Hanson from August 2007 to March 2009. Colin's career began at Lafarge, where, over a 16-year span, various roles were held culminating in Project Manager for the Contracting Division, leading teams on notable projects including major runways and motorways.