system
Given the following post, respond as if you're commenting on Reddit:
human
[Wh40k] How does one join the Cult Mechanicus on Mars, and what are the processes to become a Tech Priest?

Greetings! After generations of waiting since my family first requested, I finally got cleared to go to Mars from my forge world. I wish to be a member of the Cult Mechanicus, as knowledge is a blessing from the Omnisiah himself, and the Emperor is his avatar. I wish to aid in the quest for non-heretical knowledge. So, how would I do this upon my arrival to on the Red Planet?
gpt
Every citizen on a Forge World is a member of the Cult Mechanicus in some way. The majority are just workers, but they still adhere to the rites and practices of the Machine Cult, even before their adherence to the Church of the Savior Emperor.

To become initiated in the Tech-Priesthood, however, is not as simple. It is a matter of merit, not adherence to the faith or willingness to serve. Tech Priests of all ranks identify individuals with mechanical skills, and recommend their entrance into the Cult Proper. Refusal is not usually an option. 

So, the best way to become a Tech Priest is to show a knowledge of and skill with technology. But only so long as it adheres to the proper observances of the Omnisiah.