A consultant is not required for ISO 14001 implementation, but in some cases, companies implement this standard with the help of a consultant.

Note: Hiring a consultant could be helpful if the deadline for ISO 14001 implementation is very short or the company employees do not have any spare time to dedicate to such a project.

Examples:
- A small service company decided to hire a consultant for ISO 14001 implementation because of a very short certification deadline set by a major customer.
- A chemical company decided not to use a consultant since they have a project manager that can dedicate time to ISO 14001 implementation, and they will get the know-how for the implementation using online training.