A business operator: a person (or agent) who performs significant aspects of running a business. In this sense, operating a business is distinct from just founding it (creation/vision), funding it (investing money), or just working at it (as an employee).

A technical operator. A person who interfaces with a business to figure out what needs to be automated how, then creates that automation (typically using some custom software and some existing software) and sees it through to successful production that improves the business' efficiency, profitability, or capabilities. This may be an engineer with business and communication skills and initiative.

A sales operator. Any person in the spectrum of business growth role (e.g., from business development associate to president) who does not deliver client success directly, but instead is focused on growing the business of their firm (e.g., by finding and nurturing relationships with people whose needs they understand how to help). In this sense, the role is technically non-technical.

Generally, an agent (human or machine) that "runs" (monitors and delivers using) any other thing or system.