Lighthouse Advisory Services will increase the number of advisers working in its affinity division by approximately 100 over the next year, from 220 currently, according to joint CEO Malcolm Streatfield.
The company has taken on several recruitment staff in preparation for expansion.
The number of leads received by the division, which receives most of its work from trade unions, rose to 15,000 last year from 11,000 in 2010, according to Streatfield.
The increase is largely the result of redundancies in the public sector.
Streatfield, speaking to IFAonline following the release of the company's full-year 2011 results today, said the RDR - and particularly the implementation of a number of new rules at the same time - had been "extremely disruptive".
He said there may be a period in the first half of 2013 where advisers would see a 'downsize in remuneration' as clients take some time to be convinced by a fees proposition.
However, he said that, by 2013/14, the situation will "bed down" and advisers will see their remuneration increase again as clients and advisers alike become used to the new processes.
Streatfield's comments follow the release of the company's full year results which saw an increase in earnings to £1.6m, from £1.3m in 2010.
However the company also announced details of non-recurring expenses, pushing it to a £2.66m loss.
These expenses were the result of provisions set aside following the closure of two Sumus sub-groups - network Falcon and Scottish advice group FSAS - meaning it now operates as a single regulated entity: Lighthouse Advisory Services.
During 2011 the group lost about 100 advisers with approximately 50 leaving because they didn't want to take RDR exams, and others leaving as a result of the consolidation.
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