A former out-of-school-hours care (OSCH) program director has been attacked after being found guilty of sexually abusing a child in his care.

Brenton Kelly Dickson, 35, stood trial on allegations he sexually abused 10 girls between 2007 and 2013, north of Adelaide.

District Court Judge Michael Boylan found Dickson guilty of one charge of persistent sexual exploitation of a child and acquitted him of all other charges.

There were heated scenes as Dickson left the courthouse, with supporters of some of the alleged victims yelling abuse and attacking him.

Dickson was pushed and struck repeatedly, resulting in a cut to his eye which bled, but remained silent as he walked.

One of the alleged victims, who is now a teenager, said she found the court process extremely difficult.

"I get shivers when he's around and for me to go into court three times to face him and for him to say that he's not guilty, it just makes me feel sick," she said.

"He cannot get away with this. He's a paedophile and he deserves to go to jail."

Dickson was found guilty on a charge related to touching a victim's genital area under her clothes on at least two occasions.

Dickson an 'unimpressive witness'

Judge Boylan said in his judgment that Dickson was an "unimpressive witness".

"He played down the fact that he did not adhere to the Protective Practices Guidelines and was reluctant to acknowledge their importance," he said.

"Sometimes, he was evasive."

Brenton Kelly Dickson previously told the court he had a good rapport with children and parents. ( ABC News )

Judge Boylan said Dickson had a habit of touching children who attended the OSCH program, such as by hugging or patting them, and did so regularly in the view of staff and parents.

"I have been very careful, when considering evidence of touching which was inappropriate in the sense that it was in breach of established protocols, to bear in mind the possibility that such touchings may sometimes have been accidental and may, on other occasions, have been initiated by the children," he said in his judgement.

Judge Boylan said even though it was deliberate, the touching may have been non-sexual.

"The fact that the staff tolerated such behaviour explains, to some extent, why the accused thought he could get away with what the prosecution alleges were unlawful touchings."

Alleged victim suffers depression and anxiety

The girl said she was still struggling to deal with what happened and felt "sick" that he was still on the streets.

"I suffer with depression and anxiety. I've been going to the doctors to get help, seeing psychiatrists and counsellors to get him out of my head because he does make me feel sick," she said.

"I wish he was found guilty of all, but at least he's been found guilty of one offence.

"I want him in jail. He deserves to go to jail, to rot and think about what he's done."

A mother of one of the alleged victims also spoke outside court after the verdict and said she was disappointed in the acquittals.

"I have no idea how I'm supposed to go back to my daughter now and tell her," she said.

"It's very sad."

The woman said it had been "very hard and difficult" to deal with the allegations.

"I let him care for my children for six years," she said.

Dickson remains on bail and will be sentenced at a later date.