Professional skills include skills that aid your employees to work more efficiently and productively, such as:

• Writing skills, including spelling and grammar
• Formal and informal communication
• Time management
• Project management
• Self-management and motivation
• Work ethic.

If you observe that your team's technical skills are more than adequate but their produced work is sub-par, it may be due to a lack of the supporting professional skills. For example, do you often have to proofread your employees' emails before sending an important communication due to simple writing mistakes? Or do you find yourself attending most of the meetings that your employees are better qualified for, just because they don't present well in a professional sense?