Co-founder Jess Dennison said Atherton, who joined the specialist operator in 2018, had been "a huge driving force" in growing the company’s trade business during the past five years.
"She thoroughly deserves the promotion and we’re excited to see the further development of our trade business in the coming months and years," added Dennison.
"My personal goal when I joined the company was to eventually become head of trade sales and I am so delighted that I have achieved this five years later," said Atherton.
