Ian Ritchie has resigned as a director of Stuart Alexander and will leave the company at the end of the month to become a consultant.
Ritchie, a former Insurance Brokers' Registration Council (IBRC) councillor and a well known figure in the broker industry, emphasised the split was "entirely amicable".
Ritchie said: "It's been more than a year since my old company Foreman Bassett joined the Stuart Alexander Group.
"A lot of work has gone into integrating the companies and now that's more or less complete, I feel the time is right for me to move on."
Ritchie said he would work as a risk management consultant with Stuart Alexander, but would also be seeking other work.