Antrim medical company Randox has taken on 260 new staff since the start of the year.
The company said it's in the process of filling 60 positions this month to add to the 200 it's already hired since the start of the year, with 90% taken up by new graduates.
Randox, which focuses on diagnostics, said the recruitment rise is the result of growing demand for its products which are used in everything from hospitals to food testing laboratories to forensics.
The firm is heavily focused on exports and has been employing people for its overseas offices, as well as at its Antrim headquarters.
"Randox's market share is continually growing and we need a steady stream of excellent staff with specialist skills in areas like science, engineering, and business, so we place a lot of importance on the number of graduates we recruit," said senior manager Mark Campbell.
"As a global company Randox also needs highly talented people in our 25 international offices
"Therefore we are delighted to welcome 10 new staff to Northern Ireland who will be working in our offices in Brazil, China, France, Mexico, Korea and Vietnam. Plans to expand our manufacturing and research and development facility in Dungloe, as well as new offices in Durban, Dubai and Hong Kong and the continued expansion of our sites in Northern Ireland, mean we are always increasing staff numbers and have an impressive 117 employment exercises ongoing globally."