Student or Learner
I want you to continue as (a) project manager.
I have already understood that plural nouns and uncountable nouns can be used with zero article in some contexts where the quantity is not the interest but the type/nature of the nouns.
But, how about singular countable noun, like the example above?
Is the "a" optional above?
Thank you very much indeed.
Much obliged for your support and help.