Japan Airlines (Jal) has switched check-in providers at Heathrow Terminal 3 from American Airlines to airport service contractor OmniServ.
The company will provide staff to manage three daily check-in desks for the airline.
Employees have had mandatory training to cover dangerous goods and “intense” check-in, together with familiarisation tours around the airport and aircraft.
OmniServ chairman Ernie Patterson said: “This is new territory for OmniServ and marks the launch of a completely new service for us.
“We’re delighted to have been given this opportunity by Jal to start expanding our portfolio and it’s a testament to us that Jal had faith in us to do the job.
“This marks another step toward OmniServ cementing its leading market position in providing exemplary service across all areas of customer service within the airport.
“It also brings a whole new layer to our commitment to improving the end-to-end passenger experience.”