serve under (one)
1. To be in the service or under the direction of one. I have had the privilege of serving under eight different presidents in my time as the head butler of the White House.
2. To provide, present, or execute a formal notice, announcement, or action as dictated by a particular piece of legislation. In this usage, a noun or pronoun is used between "serve" and "under." Health inspectors have served four closure orders under the FDA's tough new rules this week.
serve under someone or something
to carry out one's responsibility under the direction or in the employment of someone. I served under the president of the company as special assistant. Jane served under the previous administration as an investigator.