Richard Marsham, previously director of account management, has also been made managing partner, bolstering the agency's direct offering.
White, previously head of direct marketing, said: "I'm delighted to be made a partner, it feels representative of the importance of direct marketing to Leith and the great work we're delivering for clients such as Seat and Velux.
"Direct marketing now accounts for around 30% of our turnover, a figure which is set to grow over the next 12 months."
The announcement follows the rebranding earlier this year of sister agency Leith London to Farm Communications, following the merger of the two agencies.
Phil Adams, Leith Edinburgh's former managing director, will now take the role of developing creative partnerships with other companies within Cello, the agency's parent company.
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