Through numerous acquisitions in the 1970s, as well as partnering with the U.S. EPA in 1973 and other federal agencies in 1985, CDM Smith expanded to offer services in clean water, hazardous waste and the environment, transportation, energy, and facilities sectors on a national and international scale.

[14] Trinnex offers software as service products, including pipeCAST, leadCAST, epiCAST and precipiCAST for water, lead pipes, epidemics and weather tracking and insights.

[15] Trinnex is headquartered in Manchester, New Hampshire, with nearly 50 employees distributed across the Unit On June 21, 2017, the US Justice Department declined to prosecute CDM Smith for corruption, despite finding that the company had paid $1.18 million to officials in India.

[16] In July 2017, CDM Smith agreed to pay around $4 million to the US Treasury,[17] after which investigations by the Fraud Section of the Criminal Division of the Department of Justice into bribery were closed.

[17] On July 15, 2017, it was announced that the Goa government had asked state chief secretary Dharmendra Sharma to investigate bribes from CDM Smith in India.