The amount of money that a Macmillan editor makes depends on a variety of factors. Those factors include experience, their position (senior vs. junior editor), location, type of work, and negotiating ability. Generally, an editor's salary will range from $40,000 to $90,000 per year, but it can be higher for an experienced editor.
In terms of job responsibilities, a Macmillan editor will typically review manuscripts for accuracy, clarity, grammar and make sure they meet the established style guidelines. They will also develop relationships with authors and help the publisher market their publications.
It is important to note that the salary of a Macmillan editor can vary greatly, depending on how much experience they have and how well they are able to negotiate their salary. It is possible to earn more than $100,000 a year if you are experienced, highly qualified and have good negotiating abilities. Ultimately, the salary you earn as a Macmillan editor will depend on many factors, so it is worth researching what you could earn before you apply.