Frank is the Chief Executive of the Environment Global Business Line, with more than 7,500 scientists, engineers and support staff serving clients globally. The business provides a full range of environmental and energy consulting, engineering and field services.

Mr. Sweet was appointed to lead the Environment Global Business Line in October 2020 and has been leading the integration of the Environment Business Line in the Americas since August 2018.  

​Mr. Sweet has held a series of operational and corporate roles including his most recent role leading Delivery Excellence which established the company’s project management systems, training and technical quality programs. Previously he was responsible for AECOM’s Northeast Region of the Americas. 

Prior to joining AECOM, Mr. Sweet led ENSR’s Environment Business in the Americas.