CBG has created a new division for its SME business and has set a target of £10m in gross written premiums in its first year.
The Manchester broker has also switched its IT system from Sirius to the Acturis broker platform, which will serve the broker's new division.
Stephen Darcy, managing director of CBG, said the decision to move to Acturis was made in November and went live within five weeks.
He said: "We have undertaken a segmentation process and that has allowed us to be more focused within our SME business. We have created a separate division now.
We have big plans in the sector and intend to work in partnership with Acturis on our growth platform and infrastructure".
Darcy added that the broker was still using the Sirius systems in other areas of the business. "We realised that Acturis would be the best platform to do that business on," he said.
Theo Duchen, co-chief executive of Acturis, said: "This project has set a new record for us in terms of a start-to-finish going live, and we are very excited at the prospect of working with the CBG team in the future.
CBG is one of the most respected consolidating brokers in the country, and a terrific partner to work with".