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
A mostly cloudy Bank Holiday afternoon, with the chance of some drizzle likely.
Welsh roads have seen the smallest reduction in deaths and serious injuries compared with other parts of the UK, according to new figures.
The number of people with dementia is expected to double in the next generation. 850,000 people currently live with the condition.