公司越来越大，管理人员的层级也在不断扩充，有些属于基层管理人员，有些是中层，还有一些是我们常说的“高层”。在英文中，公司高层都被统称为C-level。

The highest-level executives in a organization are usually called "C-level", referring to the 3-letter initials starting with "C" and ending with "O" (for "Chief ... Officer"); the traditional officers are Chief Executive Officer (CEO), Chief Operations Officer (COO), and Chief Financial Officer (CFO). Chief Administrative Officer and Chief Risk Officer positions are often found in banking, insurance, and other financial services companies.

组织机构中层的管理人员通常被统称为C-level，指的是职位以C（chief，首席）开头，以O（officer，官）结尾的高管们。常见的C-level高管有：Chief Executive Officer (CEO，首席执行官)、Chief Operations Officer (COO，首席运营官)，及Chief Financial Officer (CFO，首席财务官)。在银行、保险及其他金融服务类公司中，还会有Chief Administrative Officer（首席行政官）和Chief Risk Officer（首席风险官）。