Telecommunications giant Optus says it was "completely unacceptable" for an outlet on Sydney's affluent lower north shore to advertise for "Anglo Saxon" retail assistants.
An ad posted on Seek on Thursday stated the Neutral Bay store was looking for a casual retail consultant and noted it would prefer "candidates who are Anglo Saxon".
The ad, taken down on Friday morning, has been widely condemned by politicians, unions, and social media users.
"Optus proudly supports diversity and employs staff representing more than 70 nationalities," human resources vice president Vaughan Paul said in a statement on Friday.
"This error is completely unacceptable and a clear breach of our advertising standards and commitment to equal opportunity employment."