Sandra Busby from the Welsh Contact Centre Forum said that "even throughout the recession, this [call centre] industry has continued to grow."
She said that part of the reason for Welsh strength for call centres is communication issues experienced by customers calling overseas, and says that the new jobs are "absolutely vital" for Swansea and its economy.
More top news
Schools in Newport have started using robots to help pupils develop their ICT skills as part of a drive to teach more people how to code.
Were you fooled? We've compiled a round-up of our favourite April Fools jokes from across Wales.
The latest poll focussed attention on how people intend to vote for Westminster but it also asked about next year's Assembly election.