The firm manufacturers a range of mobile materials processing equipment under the Powerscreen and Terex Finlay brands in factories in Omagh and Dungannon.
The company plans to build new factory space, purchase new equipment and invest in research and development as part of a £22m investment package over the next four years.
Kieran Hegarty, president of Terex Materials Processing, said: “This significant reinvestment in Northern Ireland marks an exciting chapter in Terex Corporation’s 13 year history in County Tyrone and will be a major step in our long term growth plans.
“We expect our turnover to increase further over the coming years and we will need to expand our factory space and workforce to cope with projected demand.
“The assistance offered by Invest NI has been instrumental in our decision to expand here and this project will help to strengthen Northern Ireland’s position as a centre of excellence for mobile crushing and screening, from design through to manufacture and to global sales.
He added: “Our talented and committed workforce has already made a valued contribution to our success to date, and we are confident the local workforce will continue to help drive our company’s growth in global markets.”