Colby Campbell, 30, was sentenced in Wollongong District Court on Friday to five years and seven months in prison with a non-parole period of three years and one month backdated to his arrest in August 2019.

Judge Andrew Haesler jailed Campbell for supplying a large commercial quantity of drugs after police secretly recorded him delivering 1.2kg worth of ecstasy pills to the syndicate's kingpins, Joel and Flinn Westman, on July 31 2019.

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A police bug planted inside the Westmans' home in Wonson Avenue, Coniston caught the trio discussing the drug haul, packaging the pills and boasting about how much money they were going to make.

The Westman twins have since pleaded guilty to their roles as kingpins in one of the region's most significant drug supply operations.

"Mr Campbell appeared to be acting as a trusted intermediary," Judge Haesler said.

"Mr Campbell's job, on this occasion, was to get the drugs and package them.

"He was intimately involved with the principals.

"He received payment of drugs, for his own use. It was easy work, easy money and easy access to drugs.

"Mr Campbell was taking more of a risk than the principals but he did receive some reward to take those risks.

"His offending was committed without any regard for public safety."

Judge Haesler took into account the quantity of the drugs Campbell delivered to the Westmans' house and the packaging of them.

He also noted a letter written from Campbell which showed he had "insight into his offending and the impact of drugs on him and other people".

Judge Haesler heard Campbell had a solid work history as a labourer before his descent into drug dependency and debt, as well as a limited criminal history.

Campbell was also commended on his "proactive role" in establishing a drug rehabilitation program for himself and other inmates to participate in while on remand after he was told he could not access treatment.

The court heard Campbell had worked hard while in prison and had a trusted role within the jail.

"He has done everything he could while in custody to show that he is committed to living a law-abiding life once released from custody," Judge Haesler said.

"If you stick to the trajectory you are on, you will be released to parole in September next year."

In an agreed set of facts, Campbell attended the Westman's home just after 2pm on July 31 carrying a large plastic bag.

"So there's some missing, but there's more than four," Campbell told the twins as he sat down at the dining table.

"They're good, they're the Euros".

Police said the trio was heard on the listening device discussing the pills, including questioning whether they were "dodgy" of "half-cut".

The trio spent the next several minutes weighing the ecstasy pills and splitting them into 100-gram quantities so the drugs could be sold to customers.

Police said there were at least 4,200 pills in the haul.

Police said they overheard one of the brothers gloating about the profit the haul was expected to bring them.

"We're going to make $35,000 from this.....$40 individual pills.....got $300,000 worth of shit," he told Campbell and his brother.

"I hope they're cracking bro."

Police said Campbell would regularly carry out the day-to-day operations for the syndicate.

The Westman twins, along with their older brother Daniel, Nikita Campbell, who was dating Joel Westman, and other associates including Shaun Lane and David Ognenovski, were all arrested during sweeping raids on several Illawarra homes on August 16, 2019

Detectives arrested Campbell the following day outside Wollongong courthouse after he turned up to support his sister's bid for bail. He has been in custody since.

Campbell will be eligible for release on parole in September 2022.

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