Harrison was at GEMHL for around 12 months and was responsible for its credit broker channel.
Mark Snape, sales director for GEMHL’s packager channel, will take on a wider role and replace Harrison.
A spokesman for GEMHL says it is structuring the firm to meet the challenges going forward.
GEMHL recently overhauled its distribution and terminated hundreds of direct broker agencies.
It is also currently reviewing its distribution model through secured loan networks