Your employees, and the skills and knowledge they carry, are an asset in their own right. This includes both formal expertise (certifications, technical skills) and tacit knowledge accumulated on the job that may not be documented anywhere.

Small organisations are particularly exposed to key-person risk: if only one person understands how a critical process or system works, their absence — through illness, resignation or worse — can be as damaging as a technical outage. See also Employee / staff.