Halcrow Group Limited was a multinational engineering consultancy company, based in the United Kingdom
Halcrow was one of the UK's largest consultancies, with origins stretching back to 1868. The UK-based consultancy specialised in the provision of planning, design and management services for infrastructure development worldwide. With interests in transportation, water, maritime and property, the company undertook commissions in over 70 countries from a network of more than 90 offices. In 2011, the company was acquired by US firm CH2M Hill, and in 2013 it was announced that the Halcrow brand would eventually be discontinued. The parent subsequently (2015) rebranded the whole group to CH2M.
