Nicole Hatton, who spent 14 months working for Mr Maguire on a "casual" basis for "a small amount of hours per week" at NSW Parliament House, said she received "no training" on the code of conduct for working in public service.

Ms Hatton told ICAC that Mr Maguire would sign off on her time sheets and she was paid by the Parliament, but Mr Maguire or his business partner would instruct her to carry out work for their business, G8wayinternational.

"I worked for Daryl and Daryl asked me to," she said.

One of the core elements of the corruption inquiry into Mr Maguire is to investigate allegations that he breached Parliament's code of conduct for personal gain.

Counsel assisting ICAC Scott Robertson told the hearing in his opening address that the inquiry would investigate whether Mr Maguire breached public trust by "using his public office, involving his duties as a member of the NSW Parliament and the use of parliamentary resources, to improperly gain a benefit for himself and/or entities close to him, including G8wayInternational".

Ms Hatton agreed with Mr Robertson's assertion that most of the work she did for G8way "was at Parliament House and on Parliamentary time".

Ms Hatton said working for a private business but being paid by taxpayers was "skimming the boundaries of what was appropriate" but she did not consider reporting the issue and she had "no formal induction" on how or where to make a complaint.

Part of the work she performed for G8way involved adding contact details to business card templates and booking flights for the company.

Ms Hatton has denied a suggestion that she started working with G8way in the hope that it would become a successful business in the future.

"I don't feel I was connected with the company as a long-term plan ... I would never have regarded myself as a partner," she said.

Ms Hatton said she received one payment of $300 for working at G8way and she was reimbursed "when I would drop off passports and visas" because "the Chinese consulate required you to pay upfront then and there".