Fort Wayne Metals is creating 80 new jobs over the next five years at it expands its manufacturing facility in Castlebar, Co Mayo.
The €10m expansion is supported by the Government through IDA Ireland.
Founded in 1970, Fort Wayne Metals makes medical materials, producing precision wire and components for all types of medical devices.
The company's products are used in guidewires, stents, embolic filters, pacemaker leads, neurostimulation leads as well as endoscopy and orthopaedic devices and more.
The company first started operations in Castlebar in 2002 and now employs 95 staff there.
The Co Mayo facility is Fort Wayne Metals's only manufacturing facility outside the US.
The expanded facility was opened by Taoiseach Leo Varadkar over the weekend.
"This major investment shows the company is committed for the long term. Essential components for medical devices which can improve and save lives are manufactured here and sold around the world," the Taoiseach said.
Scott Glaze, the CEO of Fort Wayne Metals, said the expansion is a testament to the hard work and talent of the company's Irish employees.
"Their expertise and dedication have been fundamental to the growth of Fort Wayne Metals Ireland, and I have every confidence that they will be successful as they take on the challenges of manufacturing precision nitinol wire for our customers around the world," the CEO added.