What term describes someone who adheres to expected ethical and quality standards?

The term that describes someone who adheres to expected ethical and quality standards is "Professional." This designation implies a level of commitment to maintaining a standard of excellence in their field, which includes not only technical skills but also ethical behavior and responsibility. Professionals are often held to specific codes of conduct and are required to engage in continual learning to stay current in their field, ensuring they provide services or products that meet established quality standards.

In contrast, other options do not inherently imply a commitment to ethical or quality standards. An amateur typically lacks the same level of training or experience and may not follow professional protocols. A manager may oversee teams and projects but is not necessarily defined by adherence to ethical standards. Similarly, a technician focuses on practical skills or technical tasks but doesn't encompass the broader ethical obligations that define a professional. This distinction reinforces why "Professional" is the most appropriate term in this context.