The phrase "after the first speaker" is correct and usable in written English.
It can be used to refer to a point in time or sequence that follows the contributions of the initial speaker in a discussion or dialogue.
Example: "The moderator will open the floor for questions after the first speaker has finished their presentation."
Alternatives: "following the initial speaker" or "subsequent to the first speaker".
After the first speaker, a group of young people walked on to the stage.
In fact, the first day had gone so smoothly that Ms. Vidal was hoping to leave the conference after the first speaker; after all, so much work was waiting on her desk in her office at 270 Lafayette Street.
After the first speaker opposed to the aid began to speak, the pro-contra demonstrators moved in, hurling eggs, insults and pursuing and roughing up some of the outnumbered non-Latins, shouting "Communista!
After the first speaker had explained that Nietzsche advocated saying yes to life, and the second said that she favored positive reinforcement as a training method, the revelation came: As Dr. Lerner put it, "The Dumb Friends League advocates a Nietzschean approach to dog training".
I knew that Ali would have wanted these kinds of ideas to be presented, and at a memorial which had already taken a clear political direction after the first speaker detailed how Ali had helped African Americans in the U.S. overcome some of the ways that they had internalized negative stereotypes put on them by the racism of American society.
After Adlparvar's introduction, the first speaker, Ball, took the floor.
After the sixth speaker presented the same litany of complaints, Saleh seemed to snap.
Scott Pullins served as a top advisor to former Ohio House Speaker Larry Householder, the first speaker to take over after Ohio imposed term limits.
After a few remarks, the arena was hushed as the first speaker worked his way up to the microphone stand.
The format was simple: two speakers started, one left after 10 minutes and a new one joined, and this continued until the first speaker who had exited returned.
