Answer:
No, Jane's manager should not continue to keep her in her work role for an additional five years. She should be promoted and assigned higher specialized responsibility like a team lead.
Step-by-step explanation:
Since Jane has worked for five years already, she has acquired a lot of competence in that specialized area. She should be given another task such as a Team lead. This will give her an opportunity to learn leadership skills while she is training others to do what she had done for five years.
She should be promoted because of her loyalty and consistency. Staying at one job for five years is a proof of her dedication to the company and should not go unrewarded.