Sesame Bankhall chief executive George Higginson is leaving the group after three years at the helm.
Managing director Stephen Gazard will now take on a wider remit with responsibility for leading the executive team.
Pan Andreas and John Cupis will continue to work alongside Gazard to lead the wealth management and mortgage businesses within the group.
All will report to chairman John Cowan, who continues to lead the Sesame Bankhall board.
Finance director Paul Hooper is also leaving after four years in the role. He will be replaced by Jim Kelly who has 30 years industry experience and has held senior roles with Lloyds Abbey Life, RBS and Aviva.
Cowan said: "On behalf of the group I would like to thank George and Paul for their valuable contribution to the business and we wish them well for the future.
"We have worked hard to continually improve the value we offer to advisers to help them deliver and evidence quality outcomes for customers. This includes significant investments in our technology and compliance infrastructure, which are now paying dividends.
"We continue to receive excellent support from our members, which we never take for granted. I am looking forward to working closely with Stephen Gazard and our strong management team as we deliver on our long-term strategy to help advisers build successful and sustainable businesses."
Reflecting on the last three years, Higginson (pictured) said: "I am proud to have contributed to Sesame Bankhall group's successful transformation into a broad based financial services group and I feel it is now the right time for me to seek a new challenge. Sesame Bankhall group has a range of exciting new propositions for advisers and a strong team in place to help drive the business forward."
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