Do civilian aircraft mechanics require a security clearance?

I understand that places like Lockheed Martin probably require their aircraft mechanics to have security clearances, especially when working on military projects. But what about normal airlines such as Delta, etc. How common are civilian aircraft mechanic jobs that don't require security clearances.

I tried search engines, but all I get are job posting websites that don't answer my question.

They do not require a security clearance - that is a government terminology. They may require a background check on new hires.

They don't require security clearances, they do require drug test and background checks.

If your job requires you to be on the secure side of the gates at an airport, you will need security clearances. So those mechanics that work for Delta, United, et al. Have security clearances.

If you need to work airside at a commercial airport, then you'll need very stringent security clearances.

If you're working at a local airfield or a domestic-only airport, then you still need the usual drug and alcohol screening plus medical clearance, but the security clearances are less strict. But so are the earnings potential.

You don't need a "security clearance", but any job that gives you lone access to an airport flightline OR to operational aircraft requires a formal background check before you can be hired.

At large airports in the US where airlines and Customs operate, flight and ground crews (including mechanics) have what is called a Security Identification Display or SIDA badge. It has your name, photo, and other identifying features. They are issued by the airport management with FAA oversight, so they are not at all a "security clearance". A SECURITY CLEARANCE is issued by a US intelligence agency or the State department, and deals with access to classified information. Nothing at a civilian airport is classified.

The bigger the company, the more security they're going to have, and one that has a base at an airport, they're going to have even more security. But simply being a civilian aircraft mechanic doesn't automatically mean a security clearance. Mechanics working at small municipal airports, like the one where I used to work, need no special clearance. Being an employee of the FBO (fixed base operator, the place that sells charts and gas and sometimes has a mechanic shop or other services), as well as having a valid A&P certificate (airframe & powerplant) from the FAA is all it takes to be there doing their job.

Maybe

Hi. It depends on the company. My uncle has a flight school and he hired his cousin who has his faa mechanic license even though he had multiple felony records.