A surgeon, a former officer and a police trainer are among small-party candidates vying for Queensland seats in July's federal election.

While the argument between the big parties gets most of the attention, minor-party candidates contesting a Senate seat face an even tougher time due to recent voting changes.

Dr Des Soares, Kris Bullen and Karin Hanbidge hope to be more than just voices on the political fringe and are campaigning on shoestring budgets to offer voters an alternative.

Dr Soares, a Brisbane orthopaedic surgeon, is standing for the Nick Xenophon Team in the seat of Moreton.

The Indian-born surgeon migrated with his family to Australia when he was a teenager and studied medicine in Sydney.

"I'm just impressed by the opportunities this country has given me and so now I want to give back," Dr Soares said.

He practised in several Third World countries, including Nepal, where he met the late Princess Diana who was patron of the organisation he worked for.

"Part of my working in Nepal was to work in a mission-type hospital, to do surgery to help people who were less fortunate than I am," he said.

Dr Soares said he was disappointed by the current political situation and the lack of care for his electorate.

"I've complained to myself, I've complained to my friends and in the end I thought stop complaining and do something about it," he said.

He was drawn to the Nick Xenophon Team because it offered "a sensible, fair, middle-of-the-road voice for Moreton".

"I've seen him [Mr Xenophon] meet with people and he genuinely actually cares about people who are the underdog, so he's always speaking up for those who have no voice."

Concerns about future prompted former officer to enter politics

Kris Bullen hopes to win a seat with the Online Direct Democracy Party. ( ABC News: Kristina Harazim )

Former Queensland police officer Kris Bullen stepped aside from his current job as a compliance officer to contest the seat of Fairfax for the Online Direct Democracy Party (ODDP).

Mr Bullen said while the odds were stacked against smaller parties, he planned to campaign hard.

"It's about doing everything that I can to be as good as I can," he said.

"Whether that be for work or whether that be for politics, it's 100 per cent or nothing."

The father of two said concerns about Australia's future and the duopoly prompted him to enter politics.

"I can't just sit back and complain, realistically I want to hand my kids the best country that I can and to do that you've got to be part of the change process," he said.

He said the ODDP wanted voters to have an online say about every bill put to Parliament.

"Once we get a majority vote, we will vote that way and do what our electorate tells us to do," he said.

He said voters were tired of the combative nature of politics.

"We fiddle around the edges but we never actually fix anything or progress anything," he said. "We need to get the democracy back into our democracy."

Police trainer wants national register for convicted sex offenders

Justice Party candidate Karen Hanbidge said voters have lost faith in the major parties. ( ABC News: Kristina Harazim )

The Senate candidate for Derryn Hinch's Justice Party, Karin Hanbidge, said she believed more voters had lost faith in the major parties.

"There's a lot of people out there that are saying, look, we want something done about domestic violence, we want something done about our justice system because it's become more of a legal system," Ms Hanbidge said.

The police trainer, whose husband and son are police officers, said she had seen first-hand the disappointments officers sometimes faced.

"I thought it's about time I actually stood up and did something about it," she said.

"The police do an amazing job under very difficult circumstances and I think it can be very frustrating for them to bring people before the courts, which is what they're paid to do, and then have the courts let them go."

Ms Hanbidge said she admired Mr Hinch's commitment to protecting the defenceless and his calls for a national register for convicted sex offenders.

"I think a common sense approach is something that Derryn Hinch's Justice Party is very much about."

The party had also nominated Brisbane resident, Deb Cotter, to contest a Senate seat.