Is it OK to add or omit an indefinite article about job titles and positions?

[ansonguy]

I am going to make up three sentences below.

(1) The employer wants to change the title of (an) accountant slightly in the job ad.

(2) In his capacity as (an) accountant, he is required to travel abroad.

(3) He wants to apply for the position of (a) cashier.


As non-native English speakers, my friends and I think the sentences are all OK with or without an indefinite article.

Please give us your opinion. Thanks a lot.

 

[J&K Tutoring]

1. Okay to leave out the article, but one cannot change a title. It's the name of a position. One could change the word used to describe that job, but that would be a different word- a different title. A job description could be written (and changed) in any number of ways. Perhaps that's what you meant.

2. I think this one would be okay either with or without the article. Accountant can be a job title or it can describe the type of work one does. ('What sort of work do you do? I'm an accountant.' or: 'I am accountant for XYZ company.')

3. This one is best without the article.

 

[emsr2d2]

I prefer the use of the article in 2. If his actual official job title (capitalised) were used, then no article would be used.

In his capacity as Chief Accountant, he ...