Steve Kenny, current head of wholesale for Aegon Asset Management Europe, is to exit Kames following 16 years of service.
The departure follows Kames' announcement that it is to split its sales team in two ahead of Brexit next year, with UK and international sales continuing to be managed from London and European sales to be transferred to parent business Aegon on the continent.
The outgoing veteran was described as 'a major contributor' who would 'be much missed', said Martin Davis, chief executive of Kames Capital and head of Aegon Asset Management Europe.
Davis added: 'I would like to thank Steve for his commitment and service to both Kames Capital and Aegon Asset Management over the last 16 years.
'He has been a major contributor to the success of our organisation throughout this time and while I respect and understand his decision to move on, I know he will be much missed both within the firm and among our many clients and business partners.
'We wish him every success in his future career.’
The restructure is intended to ensure that the business will be able to continue to service European clients in case the UK crashes out of the EU without a deal governing future trade.
Former head of UK wholesale Mark Savage will take the newly created role of head of UK distribution.
Sam Carter, previously head of global financial institutions, will become head of global financial institutions and international sales.
He will be responsible for developing Kames Capital in the Americas and Switzerland and structuring the team's approach to leading global financial institutions.
Richard Dixon will become international sales director, having formerly served as European wholesale, and will support Carter in his department.
Eric van der Maarel, chief commercial officer for Aegon Asset Management, will head continental business.
Davis claimed the change would result in a 'seamless' model.
He said: ‘With the potential changes and challenges Brexit may bring post 29th March 2019, we wanted to ensure that our business model and units are fully aligned with how and where we currently do business and with the clients we serve.
'We believe this new structure and the creation of these new roles will ensure we provide our current and future clients with a seamless business model whatever the outcome of the current Brexit negotiations.'
‘I would like to congratulate Mark, Sam and Richard on their new roles and wish them every success in the future development of our business.'