Based in South Africa, Hathorn will also be chairman of the audit and risk committee of Maitland International Holdings.
According to Maitland, the appointment follows a period of growth—the company now has 17 offices globally.
Hathorn was previously CEO of FTSE 100 packaging and paper company Mondi, a position he held for 17 of his 25 years at the firm. He has also been a long-standing Maitland client.
Maitland chairman Michael Solomon said: “We have had a professional working relationship with David for more than 20 years. He brings to the boardroom not only significant corporate leadership experience but also more intimate insights into the firm from a client perspective.”
Hathorn added: “Maitland is a fast-growing and dynamic organisation with a unique business model across private client, fund and corporate services. I am proud to serve on the board of a business which is at the forefront globally across its various business areas."