Ceco Environmental board member Dennis Sadlowski will serve as interim CEO while a search process is conducted to identify a permanent CEO.
Lang has agreed to be available to the company through a transition process.
“We want to thank Jeff for the leadership and integrity he has provided during his seven years at Ceco Environmental. There has been considerable progress made in building Ceco for the future. Jeff recognised that now is the best time to find a new voice to lead Ceco through its next growth phase. On behalf of the board and all Ceco employees, we wish Jeff all the best in the next step of his career,” said Ceco Environmental chairman Jason DeZwirek.
Lang said: “I am proud of the progress that we have achieved at Ceco over the past seven years and I am most proud of the senior business leaders that we have been able to attract and develop. I know Ceco is very well positioned for the future through its quality leadership, asset-light business model and expanding recurring revenue and global footprint. I look forward to following the company’s future success in the years to come.”
Sadlowski, 55, has held a number of senior leadership roles including CEO of Siemens Energy and Automation, COO of LSG Sky Chefs, and CEO of International Battery. He also previously worked at General Electric and Thomas & Betts.