Germany, Dec. 3 -- HOCHTIEF, part of ACS Group, has expanded its partnership with Germany-focused Vulcan Energy, the world's first sustainable lithium and renewable energy business, and will have an end-to-end role in developing its lithium production and processing infrastructure.Through its company Sedgman, HOCHTIEF has 45 years' experience processing and delivering critical minerals essential to clean energy, advanced manufacturing, and digital infrastructure, including delivering more than 630 studies and projects in the sector globally.HOCHTIEF's and ACS's strategy is to expand across the critical minerals and energy transition value chain, building an integrated presence in investment, extraction, processing and infrastructure. In lin...