The Financial Times newspaper reported over the weekend that Palmer would step down, before he had been informed. A source familiar with the situation had also confirmed to Reuters the planned move.
"The board has determined that now is the time for new leadership to deliver our plans," Lawrence Stroll, Aston Martin Lagonda's Executive Chairman said.
The company said Moers, who will be based at its headquarters in Warwickshire, had built a reputation for transforming businesses in tough environments during his 25 years in senior roles at Daimler.
Germany's Daimler AG owns a 5% stake in Aston Martin and supplies the carmaker with Mercedes-AMG engines.
"Under Tobias’ leadership, Mercedes-AMG has more than doubled its product portfolio and quadrupled the number of AMG units sold, with a clear pipeline of further expansion opportunities, especially in electrification of powertrains in the performance segment," Aston Martin said in a statement. "Tobias’ focus on operating and manufacturing efficiency has delivered significant margin expansion. This strong financial performance was supported by the introduction of a clear brand management strategy, which delivered a measurable increase in brand value and awareness."
Aston Martin has seen its share price plummet since floating in October 2018.
The 107-year old British luxury carmaker earlier this month posted a deep first-quarter loss after sales dropped by almost a third due to the impact of the novel coronavirus outbreak.
"All of my and Tobias’ energy will be dedicated to building on the Company’s inherent strengths, its brand, its engineering prowess, and the skills of its people to enable Aston Martin to become one of the pre-eminent luxury car brands in the world," Stroll said.