This is the 2216th most frequent Japanese word.
社員
Employee; company staff member.
Here, 社員, combined with 新入 (new), specifies the newcomers to a company, emphasizing their training phase within its organizational structure.
新入社員は今週から研修を始めます。
The new employees will start their training this week.
In this usage, 社員 is a status or position within a company, highlighting a personal connection to the speaker.
私の兄は大企業の社員として働いています。
My brother works as an employee at a big company.
In this sentence, 社員 refers to employees as a group within an organization, focusing on their role as contributors to the company's success.