Brewster, who is leaving the Chinese tech company in January after more than nine years, has most recently been leading on media and government affairs in the UK.
That role is being divided between Paul Harrison, who will head media affairs as UK communications director; and Ashley Lumsden, director of government and public affairs, who will lead on government and policy.
Harrison joined Huawei in summer 2019 after 21 years as a Sky journalist, latterly as senior news editor in Westminster.
Lumsden was formerly a special adviser to the Business Secretary Vince Cable in the final year of the coalition government, a campaign director for the Liberal Democrats, and leader of the Lib Dem group at the London Borough of Lambeth. He joined Huawei in 2016 as head of government relations.
Consumer comms falls under the remit of Winston Eavis, marketing director, Huawei UK & Ireland.
Brewster's imminent departure follows that of Rosie Bannister, formerly Western Europe director of communications for the consumer business, who joined AxiCom in September as MD of its UK operations.
On Wednesday, PRWeek reported that Huawei’s vice-president of comms for Denmark, Tommy Zwicky, had resigned, reportedly over the issue of facial recognition technology that has been said to flag up members of China's Uighur minority to the Chinese government.