A nine-year-old boy received an encouraging response from NASA after he applied for the role of planetary protection officer.
The job was listed this week as the space agency seeks help to protect Earth from aliens.
In technical terms, the officer would assist with the "avoidance of organic-constituent and biological contamination in human and robotic space exploration".
The job advert notes that "space flight missions may intentionally or unintentionally carry Earth organisms and organic constituents to the planets or other solar system bodies".
Among the first applicants for the role was nine-year-old Jack Davis. He wrote to the space agency to explain:
"My name is Jack Davis and I would like to apply for the planetary protection officer job.
I may be nine but think I would be fit for the job.
One of the reasons is my sister says I am an alien also I have seen almost all the space and alien movies I can see.
I have also seen the show Marvel Agents of Shield and hope to see the movie Men in Black.
I am great at video games.
I am young, so I can learn to think like an Alien.
Guardian of the Galaxy