If a person is performing multiple responsibilities in the same time with professionalism for what job he/she has to search ?

Operations within any firm usually consists of multi tasking responsibilties.

Execution of job to be best by all resources available

It depends on the candidate, in which capacity he/she is working and what are the multiple responsibilites he/she is handeling.

example

if you are handeling workers visa, offer letter, salary + coordinating with clients, submitting quotes, tenders

then u can look for jobs like office admin / hr assistant and project coordinator.

hope you go the answer.