Harrison will take up the newly created position in February and will report to Georgina Crace, the division's new managing director, who will join from IPC Media in the same month.
He will also work closely with Humphrey Cobbold, the group's director of strategic development, who has been leading Trinity Mirror's supply chain review this year.
His task is to drive improved circulation performance across the regional newspapers division, which includes the Birmingham Post & Mail and the Newcastle Chronicle & Journal.
He will be responsible for identifying and sharing best practice across the division and securing a growing return on investment in newspaper sales and related marketing activities.
At Diageo, Harrison promotes spirit and beer brands to off-licence customers through the wholesale trade. He has held a number of commercial, sales and marketing roles with Diageo since 1999, and previously worked in financial services industry with Barclays Bank and Prudential.
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