He said the shift to Kuripuni comes at a time when the firm "continues to grow in Australia and prepares to enter the UK market".
The present call-centre team services more than 100,000 customers across New Zealand and Australia, he said, and the company aims to double its number of Masterton-based employees "in the medium term".
Mr Sargent said locating contact centres in regional New Zealand "is a smart move other technology companies should emulate".
"Conventional wisdom says you can't find the right talent in smaller centres. This has led to companies outsourcing contact centres offshore or locating them in large cities," he said.
"We've found the opposite to be true. Regional towns with affordable housing and growing employment opportunities are ideal for contact centres. They have young, well-educated workforces and overheads are lower than in the cities."
Mr Sargent said staff turnover remained low and "engagement is high" among its Masterton staff. Powershop has led the industry in customer satisfaction ratings since it launched in 2009, which Mr Sargent said was due "in large part" to its contact centre.
"We've attracted great talent in Masterton and their level of expertise is a credit to them. In return, we've tried to make working here meaningful and enjoyable."
Regional development consultant Jenni Giblin said the Powershop move was an example of the economic renaissance taking place in many regional towns in New Zealand.
"Regional growth is being driven by the ability to attract people and develop high-value industries. More firms should follow Powershop's lead and help make our regional towns real 21st century living environments," she said.