Employees Must Wear Uniform by FDSims4Mods at Mod The Sims 4

Set uniforms to be used automatically by NPCs working in Community or Residential Lots.
You can define outfits for the following types of NPCs:
Barista
Bouncer
Butler
Caterer
Comedian
DJ Headliner
Entertainer
Guitar Busker
Gym Trainer
Librarian
Lifeguard
Maid
Makeup Artist*
*Only Makeup Artists hired using the LittleMsSam’s Mod for that.
Massage Therapist
Mixologist
Nanny
Pizza Delivery Specialist
Professional DJ
Professional Gardener
Reflexologist
Repair Service
Vendor
Violin Busker
Yoga Instructor
Different lots can have different uniforms for the same NPC type. For example, librarians working in the Willow Creek Archive can have a different uniform from librarians working at the Quad Manor.
Finally, you also can set distinct outfits accordingly to the clothing preference. In other words, you can define one uniform for those with masculine clothing preference and another uniform for those with feminine clothing preference.