Last year the company took on 12 more staff when it won the contract to provide 24-hour monitoring for a nationwide medical alarm provider.
Wade Coneybeer, Alarm Watch general manager, said the company was already monitoring for other alarm providers and this deal brought the number of people monitored from its Guyton St office to more than 23,000.
"We've been working toward this contract for the last four years and it's finally gone live," Mr Coneybeer said.
It had been a good year for the company. It introduced a smartphone app, developed in Wanganui, which lets customers respond to alarm events without monitoring staff having to call them. And soon after, Alarm Watch was selected by telecom giant Spark to monitor its new security product.