That person is called a "launch conductor" or "countdown coordinator." Their role is to oversee the countdown process and give the final authorization for the rocket to launch.
A rocket is typically steered remotely by ground control using onboard computers that adjust the rocket's orientation and trajectory. The guidance system navigates the rocket by controlling thrust, gimballing engine nozzles, and deploying control fins or thrusters. Astronauts aboard crewed spacecraft may also have manual controls for steering in emergencies.
The person in charge of a rocket is typically called the mission commander or the mission director. They are responsible for overseeing all aspects of the rocket launch, from planning to execution.
The top part of a rocket is called the payload or the payload fairing. This is the section that carries the spacecraft or satellite into orbit.
I don't think that ANY individual person has ever built a space rocket. Such rockets are built by teams of people, not by individuals.
What is a person who steers a desert animal called
"Helmsman".
In ships or ferries, the person who steers is called a helmsman. In relatively small boats, the person that steers the boat is called a skipper.
Navigator. The person who actually steers the ship is sometimes called the helmsman.
The 'helmsman' steers a submarine.
a helm or a helms man is a person who steers the boot or submarine
helmsman
Oxen.
Helmsman
That person is called a "launch conductor" or "countdown coordinator." Their role is to oversee the countdown process and give the final authorization for the rocket to launch.
coxswain
If the boat has an oarsman...a Coxswain.