Dutch international engineer ARCADIS has named Neil McArthur chairman and CEO, replacing Harrie Noy, who has been in the roles since 2000 and will retire. ARCADIS also named to its executive board Stephanie Hottenhuis, who had been the firm's Europe director. The changes take effect on May 16. McArthur, who joined the firm last year and was an executive board member, also manages the firm's Asia and Middle East strategy and led the integration process after the firm's 2011 acquisition of London-based EC Harris LLP. McArthur is formerly Europe managing director at business consultant Booz & Co. Zachary A. Smith also becomes chief strategy and sales officer for ARCADIS U.S., Highlands Ranch, Colo., and is succeeded as president of that unit's environment division by Curt A. Cramer. Cramer continues as U.S. representative to the firm's environmental global business line team.

KBR, Houston, has elevated Darrell Hargrave to president of its industrial services business unit, responsible for industrial maintenance, on-call construction and other services in the petrochemical and energy sectors, among others. A 30-year company veteran, he was senior vice president. Promoted to senior vice president of Canada operations is Karl Roberts. Based in Edmonton, Alberta, he is a 25-year veteran and was senior vice president of sales for KBR Services.

Lisa O. Brandon has joined Geosyntec Consultants Inc., located in Acton, Mass., as a principal, responsible for its work in the federal and energy market sectors. Previously, she had been vice president of design operations for AMEC, vice president of engineering at The Shaw Group Inc. and chief engineer at Stone & Webster, which was acquired by The Shaw Group in 2000.