Am I obligated to leave my job at a company that produces men's and boys' clothing, in addition to a percentage of women's clothing not intended for veiled women until the age of 18, and do I bear sin because of that?

The ruling on selling clothes of adornment was previously addressed. It is forbidden to sell any of these garments that are used solely for the purpose of ostentatious display. It is also forbidden to work in their sale or manufacture, as this constitutes aiding in evil.