Askham was previously commercial director at Santander Asset Management UK, and during his 21 years with Santander he held senior roles in asset management, mortgages and marketing.
As propositions director, Askham will concentrate on the development and delivery of products and services, marketing and the advice and sales process.
He takes up his position today together with new managing director, Stuart Dodson.
Dodson, who was managing director of Newcastle Financial Advisers and chair of The Openwork Partnership Shareholder Council, is supported by network director, Claire Limon, strategic partner director, Liam Richards, and Askham.
Philip Howell, chief executive of The Openwork Partnership, said: “Rob has a strong track record in launching and managing mortgage, investment and wealth management propositions focused on delivering value for customers. We are delighted to welcome him and Stuart to our leadership team.
“These appointments complete the development of an enhanced leadership team that we have been drawing together to deliver our growth strategy.”