In addition to key executives, there are other positions in a company that may be considered critical, or whose loss will be difficult for the company. What will happen if a network administrator leaves? What customers or contacts would the company lose if a sales representative leaves? What other positions can you name where a loss would have a potentially significant negative effect on the company?

Every employee who works for a company plays an important role in his field. some of the key employees of a company is sales representative, marketing executives, human resource managers, etc

whereas in manufacturing sector additional employees are developers, manufacturing workers, quality testers, etc, which when leaves a company, there is always a chance for the employee to join the competitors which is a threat to integrity of a company

Plus particular field becomes unstable for that time until a good employee hire again for the same position.

If a network administrator leaves, the company may suffer from their network issues. as a network administrator maintain networks, troubleshoot with any network problem, checks the security of the network and many more, he plays a very important role in the company.

If a sales representative leaves the job from the company, sometimes it results as a great loss of a company as a sales representative is in direct contact with customers, and when they leave a job there are chances that they carry the customer with them which results in loss of business.