Sunwin's two directors and shareholders, Ramesh Kumar Koney and Phani Kumar Chevendra, used six unpaid volunteers for six weeks work in 2017.
READ MORE:
• Couple seek compensation for damaged fence after installation hack-job
• Rugby World Cup fibre jam: Chorus can only connect 50,000 before kickoff
• Chorus trials wireless technology as fibre alternative for street-to-home
• Home fibre speeds less than 75% of maximum: Commerce Commission
The Employment Relations Authority also found it had not paid the migrant workers minimum wage or holiday pay - and failed to keep employment records.
Sunwin Technologies created the volunteer programme hoping to develop new fibre technicians, the ERA report said.
"The intention was to provide interested people looking for work in the fibre installation industry with an opportunity to help expand their skills to make them employable.
"Sunwin intended and did offer volunteers paid employment after they had gained experience and if they were interested in pursuing a career in the industry."
The organisation told the ERA it believed the volunteer programme was legal and it determined Sunwin was not out to undermine workers' rights.
Sunwin Technologies was no longer operating as a business and both former directors told the ERA they had no intention to hire employees in the future.
In total, the organisation was ordered to pay $53,447 in penalties and wage arrears.
Each director, Koney and Chevendra, was ordered to pay $7527 in penalties to the ERA, meanwhile, Sunwin Technologies was ordered to pay $19,698.
The organisation was also ordered to pay $18,697.86 as arrears of wages to the Labour Inspector.