While it is advisable to dress professionally for a job interview, it is equally important to avoid underdressing. A well-fitted suit, polished shoes, and dark socks (white socks are inappropriate) constitute appropriate attire. Refrain from wearing casual uniforms, such as a student pilot uniform; instead, opt for formal business attire.
Additionally, personal grooming is essential. If you have tattoos, ensure they are discreet and covered during the interview, especially if they are visible on the forearm or other exposed areas. It is worth noting that while tattoos are acceptable for professional pilots, they must be concealed at work, so consider wearing long-sleeved shirts if necessary. The same applies to facial piercings such as eyebrow or nose piercings—they should not be visible during the interview, as they are typically not permitted in a professional setting.
For your documents, it is advisable to carry a single, organized bag—preferably a briefcase or a dark-colored handbag—rather than a backpack, to project a polished and professional image.