The antonyms of the phrase "leaving service" are staying put, remaining in service, continuing employment, and continuing service. These words suggest a sense of commitment to a particular workplace, job, or profession. The idea of leaving service implies a severance of ties and departure from one's post. The opposite of this is to stick around, carry on, and stay the course. Indeed, some may even consider it an accomplishment to have served a company, government agency, or military branch for a prolonged period. Whatever the case may be, the antonyms of leaving service indicate a steadfastness and dedication to one's work.