They violate many rules of good dress and appearance. Applying past dress and appearance practices and observations to the job search, they often make poor impressions on employers. Indeed, many international workers are used to informal wardrobes or are only familiar with dress codes on their last job. If there are two areas which international job seekers can quickly improve upon, it is their resume and personal appearance. What you write and how you appear in person communicates as much about who you as your stated education, skills, and accomplishments and what you say in interviews.
First impressions count a great deal.
Most of all, you want to communicate a positive image to international employers. Within American culture we can say with some degree of certainty what qualifies as an excellent resume and how one should best dress for job search success. In America we prefer brevity, efficiency, closure, and individualism in what we write and wear. We prefer setting goals, getting to the point, and being different rather than orchestrating a somewhat pointless performance that conforms to group norms. Many countries in the international arena do not share the same values when recruiting employees.