What is the term used to describe a person who has demonstrated the ability to solve problems in a specific field through their education or experience?

The term that accurately describes a person who has demonstrated the ability to solve problems in a specific field through their education or experience is "qualified person." This designation indicates that the individual possesses the necessary training, knowledge, and experience to make informed decisions and perform tasks safely and effectively within that field.

A qualified person typically has undergone formal education or practical training and has acquired relevant experience, enabling them to address complex issues and apply best practices. This level of competence is essential in various industries, especially where safety and technical precision are critical, such as in rigging operations.

In contrast, other terms like "registered individual," "expert consultant," and "trained technician" convey different meanings or levels of expertise that may not specifically highlight the problem-solving skills or competency within a designated field, making them less suitable in this context.